Ross, 36, experienced concussion symptoms after taking a pair of foul balls off his catcher's mask in the game on May 11 against Toronto. He made a one-game rehab assignment for Double-A Portland yesterday, going 1-for-3 with a double and an RBI as the starting catcher. In 15 games for Boston this season, he is hitting .209 (9-for-43) with four home runs and five RBI.
Lavarnway, 25, has had two stints with the Red Sox this season. In three games (two starts) for Boston, he has hit .250 (2-for-8) with one double and two RBI. Lavarnway will rejoin Pawtucket where he has hit .313 (25-for-80) with seven doubles, two home runs and 15 RBI in 22 contests.
Victorino, 32, experienced tightness in his left hamstring in the sixth inning of Monday's game in Chicago. In 34 games for Boston this season, he is batting .283 (36-for-127) with four doubles, two home runs and 10 RBI. Victorino, who has yet to commit an error in the field in 2013, has a team-leading four outfield assists, tied for fifth-most among American League outfielders.
Aceves, 31, will rejoin the Red Sox for his second stint with the club in 2013. He worked out of the starting rotation at Pawtucket, going 2-1 with a 3.13 ERA (8 ER/23.0 IP) with 11 walks and 21 strikeouts in four starts. He has allowed two earned runs or fewer in three of his four starts. With Boston this season, Aceves was 1-1 with an 8.66 ERA (17 ER/17.2 IP) in five games (three starts).
Middlebrooks, 24, left last night's game against Cleveland in the fifth inning due to low back spasms. In 46 games this year, he has hit .201 (35-for-174) with 12 doubles, eight home runs and 21 RBI. Middlebrooks' eight home runs are tied with David Ortiz for the club lead and are fourth-most among AL third basemen.
Iglesias, 23, also rejoins the Red Sox for his second stint of the year. In 33 games for Pawtucket this season, he has hit .202 (24-for-119) with two doubles, four home runs and 15 RBI. Iglesias made his first career Opening Day roster with the Red Sox in 2013 and hit .450 (9-for-20) with two doubles and one RBI in six games at the major league level.