In an effort to get bigger on the interior defensive line, the Bucs went out and sign Beau Allen at the beginning of free agency. But, they didn’t stop there, as they have officially signed defensive lineman Mitch Unrein.

Unrein’s deal is for three years at $3.5 million per year.

Unrein, who turns 31 later this March, is 6-foot-4, 300 pounds. He’s a player who has played both interior defensive line in a 4-3 and defensive end in a 3-4.

After going undrafted in 2010, Unrein was signed by the Denver Bronocs, in which his first snap as an NFL player (which was against the Buccaneers) was actually at fullback, where he caught a touchdown pass from Peyton Manning. Unrein has played for the Broncos, the Chargers, and most recently the Bears. He had 37 tackles and 3.5 sacks over the last two seasons, but is more of a big body than a stats guy. he was the second highest graded run stopper at his position according to PFF.