The Cleveland Browns signed linebacker Zac Diles and two quarterbacks, Tyler Thigpen and Vince Young, the team announced Thursday.
All three players participated on a tryout basis during the Browns' voluntary minicamp this week.
Diles, a 6-foot, 245-pound veteran entering his eighth NFL season out of Kansas State, spent parts of the past two seasons with the Tennessee Titans. The Titans initially signed him as a free agent in May 2012, but a broken leg after six games truncated his first season there.
An unrestricted free agent, Diles signed with Kansas City and spent 2013 training camp with the Chiefs, then re-signed with the Titans and spent eight weeks in Tennessee before the Titans released him in early December.
Houston's seventh-round selection in the 2007 NFL Draft, Diles spent his first four seasons (2007-10) with the Texans before signing as an unrestricted free agent with the St. Louis Rams in 2011. Released at the end of 2011 training camp, he spent most of that year with the Tampa Bay Buccaneers before finishing the campaign with the Indianapolis Colts.
In seven seasons, Diles has played in 69 games with 31 starts. He has one sack, one interception, three forced fumbles and one fumble recovery.
Thigpen, a 6-1, 216-pound signal-caller from Coastal Carolina, is a seventh-year veteran. Selected one slot ahead of Diles in the same 2007 NFL Draft, 217th overall by the Minnesota Vikings, he spent all or parts of his first three NFL seasons (2007-09) with the Chiefs. In 2011, Thigpen started 11 games, the most extensive action of his career, completing 54.8 percent of his passes for 2,608 yards, with 18 touchdowns and 12 interceptions.
Traded to Miami early in the 2009 season, Thigpen played for the Dolphins through 2010, then spent the 2011-12 seasons as a reserve with the Buffalo Bills.
In six NFL seasons, Thigpen has a 72.5 passer rating. In 29 games, including 12 starts, he has completed 275 of 509 passes for 3,222 yards, 21 touchdowns and 18 interceptions.
Young, a 6-5, 229-pound veteran, enters his seventh NFL season out of Texas. The third overall selection by Tennessee in the 2006 NFL Draft, Young spent five seasons and was named to two Pro Bowls (after the 2006 and '09 seasons) with the Titans, prior to signing with the Philadelphia Eagles in 2011.
Young owns a 31-19 (.620) record as a starting quarterback in the NFL, passing for 8,964 yards and 46 touchdowns while rushing for 1,459 yards and 12 scores. Young was named the 2006 AP NFL Offensive Rookie of the Year, and in 2007 led the Titans to a wild-card berth.
Prior to signing with the Browns, Young competed in training camp and the preseason with the Buffalo Bills and Green Bay Packers in 2012 and 2013, respectively.
Young and Browns quarterbacks coach Dowell Loggains spent five years (2006-2010) together in Tennessee, where Loggains served as the quarterbacks coach/pass game coordinator in 2010.