Made 20 starts in his 2nd ML season, missing the Red Sox' first 51 games on the disabled list...Posted a 3.24 ERA (28 ER/77.2 IP) with a .210 opponent AVG in 14 starts after being recalled from Triple-A Pawtucket on 7/15. Among AL pitchers after the All-Star break (min. 75.0 IP), ranked 3rd in opponent AVG, 8th in SO/9.0 IP (9.15), 11th in ERA, and 12th in WHIP. Carried a no-hitter into at least the 5th inning on 8/16 at BAL (into 5th), 9/4 at OAK (8th), and 9/20 at BAL (5th)... Also took a no-hitter into the 4th inning on 8/1 at SEA. Surrendered 2.30 HR/9.0 IP in his first 9 starts through July (12 HR/47.0 IP), compared to 0.60 HR/9.0 IP in his final 11 starts (4 HR/60.0 IP)...His 0.60 HR/9.0 IP ratio led the AL and ranked 5th in the majors among the 107 pitchers who threw at least 50.0 innings from 8/1 on. In 8 road starts after the All-Star break, posted a 1.90 ERA (10 ER/47.1 IP), a 0.87 WHIP, and a .161 opponent AVG...Among ML starters on the road in the 2nd half (min. 30.0 IP), ranked 1st in opponent SLG (.256), 2nd in opponent AVG, 5th in ERA, and 4th in WHIP. Opponents batted only .183 (19-for-104) when leading off an inning, the 2nd-lowest mark in the AL and 6th-lowest in the majors (min. 100 BF). Made 3 starts in which he struck out 8+ batters and recorded 16 or fewer outs. Over 3 starts at Camden Yards from 5/31-9/20/16, recorded a streak of 29 straight outs without allowing a hit (3 BB). Began the regular season on the 15-day DL with a right patella subluxation...Made 5 rehab starts with Triple-A Pawtucket from 4/28-5/24, going 0-3 despite a 3.54 ERA (11 ER/28.0 IP). Was returned from his rehab assignment and reinstated from the DL on 5/31...Earned the win at BAL that night, allowing 2 runs on 6 hits over 6.0 frames on just 89 pitches. Went 0-3 with a 10.03 ERA (26 ER/23.1 IP) in 5 June starts...Optioned to Pawtucket following his start on 6/27 at TB after allowing career highs in hits (11) and earned runs (tied, 9). Made 2 starts with the PawSox following the option, allowing just 2 runs on 5 hits over 10.0 IP...Dealt 7.0 shutout frames on 7/3 vs. Columbus in an eventual 16-inning walk-off win...Was his longest scoreless outing at the Triple-A level, and longest at any level since his ML debut on 5/28/15 at TEX (7.2 IP, 3 H, 0 R). Recalled on 7/15 and allowed 3 or fewer runs in each of his next 7 starts (7/16-8/16), posting a 2.52 ERA (11 ER/39.1 IP) and a 1.14 WHIP in those outings while striking out 39 and walking just 12. Earned the win at Yankee Stadium on 7/16, allowing just 1 ER over 7.0 frames and improving to 4-1 in 5 career starts vs. NYY...Became the 1st Red Sox since 1913 to give up 2 or fewer ER in each of his first 5 career starts vs. NYY...Would extend that streak on 8/11 vs. NYY at Fenway (7.0 IP, 3 H, ER, BB, 6 SO), becoming the 1st ML starter to limit the Yankees to 2 or fewer ER in each of his first 6 career starts vs. the club since Mike Garcia did so in his first 6 from 1949-51 (Drew Smyly later joined that group). On 7/22 vs. MIN, struck out 8 batters in just 5.1 IP. From 8/11 through the end of the season, held lefties to a .156 AVG and a .188 SLG (5-for-32, 2B). Allowed just 5 hits over 3 starts from 8/16-9/4, holding opposing hitters to a .088 AVG (5-for-57). Held the Orioles hitless through 4.0 IP on 8/16 at Camden Yards before being removed from the game with left hamstring tightness (7 SO, 2 BB). In 5 September starts, posted a 2.89 ERA (9 ER/28.0 IP) and a .192 opponent AVG (30 SO, 7 BB). On 9/4 at OAK, did not allow a hit until surrendering an infield single to Marcus Semien with 2 outs in the 8th inning...Finished with 1 hit allowed over 8.0 scoreless innings, tying a career-long outing (also 8/18/15 vs. CLE)... Was the 1st Sox starter to throw 8.0+ innings and allow 1 or 0 hits since Jon Lester on 5/3/14, also vs. OAK. Struck out 29 of 69 batters faced over his final 3 starts (16.2 IP, 15.7 SO/9.0 IP)...Struck out the side in 5 of his last 8 full innings. On 9/20 at BAL, allowed his 1st hit with 2 outs in the 5th inning... Over 3 starts from 5/31-9/20, recorded a streak of 29 straight outs at Camden Yards without allowing a hit (3 BB). Struck out a career-high 13 hitters on 9/25 at TB, tied for the 7thmost SO by a Sox LHP since 1913...Tied the highest strikeout total by any pitcher since 1913 in an outing of 5.1 IP or shorter (also Alex Cobb on 5/10/13 vs. SD and Zack Greinke on 9/25/12 vs. SEA)...His final 12 outs were SO, from the 2nd out of the 2nd inning to the 1st out of the 6th...Struck out his final 6 batters faced, combining with Heath Hembree (5 straight SO) to set a ML team record by striking out 11 consecutive batters...The Sox set a single-game franchise record with 23 SO that day (in 10 inn.), becoming the 5th team ever with 23+ SO in a game and the 1st to do so in 10 innings or fewer. In his final start of the regular season on 10/1 vs. TOR, struck out 9 batters over 5.0 IP, allowing 3 runs on 3 hits... Fanned the side in the 2nd and 5th innings. Following the season, made 4 starts for Magallanes in the Venezuelan Winter League (1-1, 3.38 ERA, 4 ER/10.2 IP, 4 BB, 12 SO)...Pitched 5.0 scoreless innings on 12/20 at Margarita. POSTSEASON: Named to the Red Sox' ALDS roster, but did not appear in a game.
Recalled by BOS in late May and made 21 starts as a 22-year-old in debut ML season, going 10-6 with a 3.85 ERA (52 ER/121.2 IP). Honored as the Boston BBWAA's Red Sox Pitcher of the Year and Red Sox Rookie of the Year in his 1st full season in the organization. Went at least 5.0 IP and allowed 1 or no ER in 12 of his starts, tying for the most such starts through any player's first 21 career ML games since at least 1914 (also Stephen Strasburg, Matt Harvey, Dwight Gooden, Cal Eldred), the most by a LHP...Matched Gooden (1984) as the only pitchers with 12 such starts within their first 21 games, all in the same season. His 21 starts were the most in a season by a Red Sox rookie since Daisuke Matsuzaka in 2007 (32 starts), most by a left-handed Sox rookie since John Curtis in 1972 (21 starts). Among Red Sox pitchers with at least 100.0 IP, ranked 1st with a .255 opponent AVG (120-for-471)...Finished 2nd among that group in ERA and WHIP (1.29), trailing only Clay Buchholz (3.26 ERA, 1.21 WHIP in 113.1 IP). Led AL rookies in wins and finished 2nd among left-handed AL rookies with both 98 SO and 13 quality starts...Was the Red Sox' 1st left-handed rookie to reach double digits in wins since John Curtis in 1972 (11- 8)...His 13 quality starts were most by a lefty rookie with BOS since Hal Wiltse in 1926 (15). Was the 1st Red Sox pitcher to win at least 10 games and post a sub-4.00 ERA before turning 23 since Mike Nagy in 1969...Was the 1st Red Sox left-hander to do that since Babe Ruth in 3 straight years, 1915-17 (Source: Elias). Recalled from Triple-A Pawtucket on 5/28 and made ML debut that night at TEX (7.2 IP, 3 H, 0 R, 2 BB, 7 SO)...Became the 1st pitcher in Red Sox history to go at least 7.2 IP, allow no runs, give up 3 hits or less, and strike out as many as 7 batters in his ML debut...Was the longest scoreless outing for a Red Sox in his ML debut since Billy Rohr on 4/14/67 at NYY (9.0 IP). Was 22 years, 51 days old on 5/28, the youngest Red Sox left-hander to start and win his ML debut since Billy Rohr at 21 years old in 1967...Was the youngest pitcher to make his ML debut as a starter for the Red Sox since Michael Bowden at 21 years old on 8/30/08 vs. CWS, the youngest Red Sox LHP to do it since Abe Alvarez at 21 years old on 7/22/04 vs. BAL. Had a 0.44 ERA (1 ER/20.2 IP) after his first 3 starts, allowing 1 ER and 8 hits total while striking out 21 over 20.2 IP...According to Elias, was the 1st pitcher in baseball history to go at least 6.0 IP while allowing no more than 1 run or 3 hits in each of his first 3 ML games...Elias also says he was the 1st pitcher to begin a career with 3 straight starts of 6.0+ IP, 7+ SO, and 1 ER or fewer since ER became an official stat (1912 in NL, 1913 in AL). Allowed 10 total ER over his last 7 starts beginning 8/18...His 2.08 ERA (43.1 IP) in that stretch ranked 2nd in the AL to CLE's Cody Anderson (1.66) and 3rd in the majors among LHP, trailing only PIT's J.A. Happ (1.34) and LAD's Clayton Kershaw (1.53). Posted an AL-best 1.87 ERA (17 ER/81.2 IP) in 13 night games, trailing only CHC's Jake Arrieta (1.51) among all major leaguers (min. 75.0 IP)...Had a 7.88 ERA (35 ER/40.0 IP) in 8 starts during the day. Held opponents to a .229 AVG with RISP (24-for-105), including just 5-for-46 (.109) with RISP and 2 outs. Went 3-1 with a 2.22 ERA (6 ER/24.1 IP) in 4 starts against the Yankees...Was the 1st Red Sox pitcher to beat the Yankees 3 times in a season before turning 23 since Mike Nagy in 1969 (3-0), and the 1st Red Sox LHP to do it since Babe Ruth in 1917 (5-0). Began the year with 8 starts for Triple-A Pawtucket...Went 4-3 with a 2.98 ERA (16 ER/48.1 IP) and 44 SO compared to 7 BB before his call-up. Following the season, ranked by Baseball America as the No. 5 prospect in the International League.
Posted a 2.85 ERA (86.0IP, 27ER) in 14 starts with Single-A Frederick before being promoted to Double-A Bowie in late June...Named Organizational Pitcher of the Month in May, when he went 5-0 with a 2.23 ERA (41.0IP, 10ER) in six starts...Selected to Carolina League Mid-Season All-Star Team and pitched a scoreless inning in the All-Star Game...Named to MLB All-Star Futures Game and pitched a scoreless inning, striking out one...Named the O's No. 3 prospect after the season by Baseball America...Was named a top 100 overall prospect by ESPN.com (43), Baseball Prospectus (61) and MLB.com (68)...Pitched for Surprise in the AFL after the season, earning the win in the championship game, starting and tossing 3.0 scoreless innings (2H, 4K).