He provided a little bit of comfort in saying both are expected to play in Sunday's Week 2 game against the Jets.
The Steelers were down to their last offensive linemen after Foster went down with what Tomlin described as an "ocular migraine," which is apparently a migraine in your eye.
Gilbert had gone down earlier with a hyperextended knee. Doug Legursky backed up Foster, and failed to impress. Mike Adams replaced Gilbert and performed reasonably well.
The Steelers' offensive line, though, won't grade out well in the loss, having averaged 2.9 yards a carry on 26 attempts. Some of that may be on the head of running back Isaac Redman, who did not look comfortable in his 11 carries - which went for 20 yards.
The Jets allowed a huge day to Bills RB C.J. Spiller, and the Steelers will need Foster and Gilbert back close to 100 percent if they wish to establish a running game. That will be a pivotal match-up to watch in Week 2.