It's been a rough season for Steelers' linemen.

While Maurkice Pouncey has yet to play this season with an ankle injury, Kelvin Beachum was lost six weeks into the season with a torn ACL. This week, another Pittsburgh linemen's season ended before it began, as veteran tackle Mike Adam's season officially ended on the team's PUP (player unable to perform) list.

The team had until Tuesday to remove players from its PUP list. Adams remained on the PUP list after the deadline, thus meaning that he will remain there for the remainder of the season.

Adams, who has been battling a back injury prior to the start of the season, did not appear in a regular season game this year. The team's No.2 draft pick back in 2012, Adams has appeared in 41 games, making 20 starts that included a career-high 10 starts in 2013.