Tank's debut will have to wait.
Rookie defensive lineman Tank Carradine has been shut down for the season after spending the first eight weeks on the reserve/non-football injury list rehabbing an ACL tear sustained last November. Tuesday he was placed on injured reserve.
According to a report from the Sacramento Bee, Carradine's knee was examined again by team doctors recently and the decision was made to shut him down for the season. He had not been active in any of the team's five games since returning and missed all of training camp while recovering.
Carradine will spend the rest of the year rehabbing his knee to full strength in preparation to make his NFL debut next fall.
Depth along the defensive front has allowed the 49ers to take their time with Carradine. Backup Tony Jerod-Eddie has been a pleasant surprise in a limited role this season behind Justin Smith and Ray McDonald. Should the 49ers need to dip further into their depth, they can rely on Demarcus Dobbs and rookie Quinton Dial to step in.
With its open roster spot, San Francisco signed offensive lineman Ryan Seymour off the Seahawks' practice squad, extending the long chain of players that have spent time with both teams.
Seymour was drafted by the Seahawks in the seventh round out of Vanderbilt last spring and has experience playing all five offensive line positions in college. His addition indicates Mike Iupati is likely to miss his fourth-straight straight after suffering an MCL sprain to his knee against the Saints Nov. 17. Seymour will join Daniel Kilgore and Joe Looney as insurance along the offensive line that's seen injuries to Pro-Bowlers Joe Staley and Iupati in recent weeks.
Wylie - a Sacramento native - has bounced around from the Chiefs, Cardinals, Steelers, Titans and Seahawks this season. The 25-year-old Fresno State alum has been used mostly as a kick and punt returner, a spot the 49ers are thin at behind LaMichael James.
Follow Editor in Chief Chris Biderman on Twitter.