The 49ers released offensive tackle Luke Marquardt, an undrafted free agent a year ago who spent the 2013 season recovering from a foot injury, a league source said. Marquardt was eligible to take part in the team’s ongoing rookie minicamp but was not on hand today.
The only player listed as an offensive tackle at the minicamp is Carter Bykowski, a seventh-round pick a year ago who spent 2013 on the practice squad. Fou Fonoti, who is listed as a guard, played tackle at Michigan State. Fonoti is an undrafted rookie.
Marquardt was intriguing because of his size -- 6-8, 315 pounds -- long arms (34 1/2 inches) and athleticism. However, he played at a small school, Azusa Pacific, and missed the 2012 season there with the same foot injury that sidelined him in 2013.