Miami Dolphins starting tight end Charles Clay will be a game-time decision in Sunday's game against the Denver Broncos, a source tells ESPN.com.

Clay's status is in question following a recent hamstring injury he presumably suffered in practice this week. Clay practiced on Wednesday and a hamstring injury was not listed on the official injury report. However, he sat out Thursday due to a hamstring and a lingering knee injury that he's played through all season.

Clay is Miami's third-leading receiver with 39 receptions to go with 346 yards and two touchdowns. If Clay cannot suit up Sunday, backup tight end Dion Sims will start against the Broncos (7-3). Sims has nine receptions for 127 yards and one touchdown this season.