yes, walker did come back in the game. however, he also did leave the game a series or 2 before the rest of the starters on defense were pulled. He was on crutches with ice on his ankle/foot on the sidelines. definitely could've been precautionary and due to the score of the game, but groark played a couple series with the rest of the starting defense.
I noted on the video after the teams shook hands that he and Trinity's Merrifield shared a few seemingly complimentary words. Glad to see the mutual respect.