The San Diego Chargers continued to add pieces to their 2014 roster, bringing the versatile David Johnson into the fold on Wednesday. The tight end is regarded as an excellent blocker with pass catching ability, and has appeared at fullback over his career as well.

Over four seasons with the Pittsburgh Steelers, Johnson appeared in 52 games, recording 22 catches for 216 yards and one touchdown in the process. His top season came in 2011 when he snared a career-high 12 balls for 91 yards and a score. He started all 16 games that season as well as the team’s lone postseason game at fullback. Unfortunately, he suffered a season-ending knee injury the following preseason and missed the entire 2012 campaign. Johnson returned to action in 2013, appearing in five games with two starts. He was off to a strong start with four catches for 70 yards, averaging 17.5 yards per catch, before suffering a left wrist injury that once again ended his season.