Donald Grant Thomas (born September 25, 1985) is an American former professional football guard.

Thomas' strong work ethic eventually earned him a full scholarship and a starting guard position where he was named All Big East in 2007 for UConn.

The injury later proved to be a Lisfranc fracture and Thomas was placed on season-ending injured reserve on September 9.

Thomas was signed by the New England Patriots on September 14, 2011, after a season-ending injury to starting center Dan Koppen created an opening on the roster.

[4] Thomas immediately became the starting left guard for the Colts, but was placed on injured reserve after sustaining a quadriceps tear in a week two loss to the Miami Dolphins, his former team.