The Panthers have signed offensive linemen Fernando Velasco and Kevin Matthews, the team announced Wednesday.
Velasco, 29, started 11 games at center for the Steelers last season before rupturing his achilles tendon in week 13.
The 6-foot-3, 308-pound Velasco spent his first two seasons with Tennessee on the practice squad after going undrafted out of Georgia in 2008. He signed with Pittsburgh after starting 16 games -- three at guard -- for the Titans in 2012.
Matthews, the son of Hall of Fame offensive lineman Bruce Matthews, went undrafted out of Texas A&M in 2010. He appeared in 14 games with Tennessee in 2012 but was waived by the Redskins in training camp last year.
The Panthers went 12-4 and finished first in the NFC South last season before falling to the 49ers in the divisional round of the playoffs.
More: Offseason report card: Panthers
- Chris Johnson