This marks the second veteran receiver to join the team in as many days, both of whom played under Baltimore offensive coordinator Jim Caldwell when he was with the Indianapolis Colts.
Clark, 34, has played 10 seasons in the NFL, the first nine of which came with the Colts. Last season, the 6-foot-3, 257-pounder made 47 catches for 435 yards and four touchdowns in 16 games (seven starts) with the Tampa Bay Buccaneers.
In his career, Clark has 474 receptions for 5,322 yards and 50 touchdowns. His best season came in 2009, Caldwell's first year as Colts head coach. Clark caught 100 passes for 1,106 yards and 10 scores to earn All-Pro honors that year.
The signings of Clark and Brandon Stokley the last two days vastly deepens the Ravens' pool of available receiving options, both in quantity and quality.
In the team's first preseason game, the only experienced guys were Torrey Smith, Jacoby Jones and Visanthe Shiancoe. Adding Clark and Stokley provides the Ravens with two players who have successful track records on top of familiarity with Caldwell.
The next step will be developing a rapport with quarterback Joe Flacco. Bringing in two possession-type receivers could also allow the team to keep the big-play roles of Smith and Jones the same while helping to replace the safety nets Flacco lost in Anquan Boldin and Dennis Pitta.