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.
Thigpen, a 6-1, 216-pound signal-caller from Coastal Carolina, is a seventh-year veteran. 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. 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.
---The Atlanta Falcons signed free agent tight end Bear Pascoe, the team announced Thursday.
The 6-foot-5, 265-pound Pascoe was originally selected by the San Francisco 49ers in the sixth round of the 2009 NFL Draft. He was signed by the New York Giants on Sept. 15, 2009. He has played in 66 career games with 32 starts and has recorded 38 receptions for 333 yards with one touchdown.
In 2013, Pascoe saw action in all 16 games with six starts for the Giants and caught 12 passes for 88 yards. Pascoe played in 45 games with 37 starts at Fresno State while totaling 112 receptions for 1,294 yards, and 10 touchdowns.
---The Kansas City Chiefs signed offensive guard Otis Hudson on Thursday, according to the NFL's transactions.
The 6-foot-5, 330-pound Hudson had stints on the Cincinnati Bengals' practice squad in the 2010, 2011 and 2012 seasons and was briefly with the team last summer. Hudson, 27, was a fifth-round pick of the Bengals in 2010.