There was more than a little concern following
Center Jake Brendel, guard Alex Redmond and tackle Conor McDermott went to the sideline following plays during 11-on-11 drills.
The extent of the injuries were not known.
Brendel, a senior, has been a rock on the offensive line the last three seasons. He has started 39 of the last 40 games, missing only the 2014 season opener at Virginia because of a knee injury. Freshman center Fred Ulu-Perry struggled with snaps after Brendel was sidelined.
McDermott became a starter at left tackle the last six games in 2014 and the Bruins' pass protection improved considerably. Redmond has started 20 games the last two seasons.
Offensive line coach Adrian Klemm said, "we'll have to see," when asked about the injuries.