Northwestern coach Pat Gitzgerald will be without two of his best defensive players for the Wildcats’ Holiday Bowl against Oregon on Dec. 31.

Senior defensive tackle Jordan Thompson will miss the game after requiring knee surgery and senior linebacker Nate Hall underwent shoulder surgery.

Both made announcements Friday night on Twitter:

Thompson finished with 30 tackles (six for loss), three sacks, three pass deflections and two forced fumbles in 12 games this season. He was Pro Football Focus’ No. 2-rated defensive linemen in the Big Ten.

Hall also wraps up an outstanding four-year career with the Wildcats, where he collected 261 tackles (31 for loss) and five interceptions in 45 games.

The Holiday Bowl will kick off at 7 p.m. EST on FS1.