Source: Will Yeatman hurt in practice

DAVIE, Fla. -- Miami Dolphins backup offensive tackle Will Yeatman suffered a knee injury in Wednesday's practice, a source told ESPN.com.

The Dolphins won't be able to confirm the exact nature of the injury until Yeatman has an MRI later this week. Yeatman was mentioned on Wednesday's practice report as a limited participant due to a knee injury.

This is another big blow to Miami's offensive line, which is already down two starters following the indefinite suspension of guard Richie Incognito and right tackle Jonathan Martin leaving the team. Martin bolted Miami on Oct. 28, and hasn't returned due to allegations of bullying and harassment by Incognito. The NFL is investigating the matter.

Yeatman recently began earning playing time as an additional lineman on running plays. He was a converted tight end learning how to play offensive tackle. Yeatman also was a top reserve if starting offensive tackles Bryant McKinnie or Tyson Clabo were injured.

The Dolphins won't return to the practice field until Friday. Miami will host the San Diego Chargers on Sunday.