Dolphins sign DE Gannon Conway, RB Orleans Darkwa

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The Dolphins added two more rookie free agents on Tuesday, signing Arizona State defensive end Gannon Conway and Tulane tailback Orleans Darkwa.

Conway (6-4, 280) started every game for the Sun Devils in 2013, recording 38 tackles and 3.5 sacks. Overall, he notched 51 tackles and 5.5 sacks in three seasons with Arizona State.

In four seasons with the Green Wave, Darkwa (6-0, 210) rushed for 2,957 yards and 39 touchdowns on 663 carries. He also caught 77 passes for 595 yards.

According to Jim Wyatt of the Nashville Tennessean, Darkwa also had an invitation to attend the Titans’ rookie minicamp on a tryout basis.

In another roster move Tuesday, the Dolphins waived punter Matt Szymanski, a first-year pro from SMU.