The Tampa Bay Buccaneers acquired guard Rishaw Johnson from the Kansas City Chiefs in exchange for safety Kelcie McCray on Thursday.

The Bucs continue to search for depth in the middle of their offensive line.

Johnson (6-foot-3, 313 pounds) originally entered the league as a college free agent with Seattle in 2012 and spent 13 weeks on the Seahawks' practice squad, before being promoted to the active roster for the final four weeks of the season.

After spending the 2013 offseason with the Seahawks, Johnson was waived in the final round of cuts, before being added to Kansas City's practice squad. After spending the first three weeks of the season on the practice squad, Johnson was promoted to the active roster.

During the 2013 season, Johnson played in three games, with one start, and saw playing time in the Chiefs' AFC wild-card game at Indianapolis.

McCray played in 11 games for the Bucs last year, signing with Tampa Bay after being waived by the Miami Dolphins last season.

The Bucs also signed guard R.J. Mattes and waived defensive end James Ruffin.

Mattes entered the NFL with the New England Patriots as a college free agent out of North Carolina State in 2013, playing in two games during the 2013 preseason before being released. Mattes spent the 2014 offseason with the Patriots.