Lowrie left the game following a strikeout in the top of the first, when he felt his already-ailing left shoulder worsen. Buchholz got the win on Thursday, but his performance was limited to five innings and 81 pitches, thanks to lower back tightness.
Of the injuries, Buchholz's seemed like more of a nag, where Lowrie's could be more severe.
"It felt like [my shoulder] slipped out," said Lowrie. "No, it wasn't out. It just felt like it, but it went back in."
Lowrie has been feeling discomfort in his left shoulder since May 29, when he had a collision in Detroit with teammate Carl Crawford. He is 5-for-39 since the injury and grimaced after his strikeout against David Price.
The shortstop will be examined on Friday back in Boston by team medical director Dr. Tom Gill.
So, too, will Buchholz, whose back has nagged him in recent weeks. With the Red Sox already expected to recall Andrew Miller from Triple-A Pawtucket and start a game as early as Monday, it could be a good time to give Buchholz a breather and let his back heal up.
The Red Sox gave him two extra days of rest prior to his start on June 10 in Toronto.
"We certainly don't want to go through the rest of the year like this, having this thing linger," said manager Terry Francona. "We'll get him reevaluated. There's some days off coming up. We'll get him looked at tomorrow by Dr. Gill and see where to go from there."
Buchholz didn't seem overly worried about it.
"Grabbing is pretty accurate," Buchholz said. "It feels like a pulled muscle that's in there. Every time I tried to get out and extend a little bit more with just about every pitch, that's when I felt it. The last inning, I felt like I was compensating in my delivery for it. I think that's how you're going to get yourself hurt in other places."
Lowrie was out of the lineup for the first two days in New York last week and underwent an MRI, which came back clean.
After starting for three straight days, Lowrie was out of the lineup the next two games before returning Tuesday night.
Things seemed to worsen after the swing and miss against Price.
"Well, yeah. I mean, I certainly wasn't this sore [before]," Lowrie said. "I don't really know what's going on yet either. I just know what I felt."