Three-star running back Colby McDonald committed to Maryland football Friday afternoon, he announced on Twitter. His decision boosted the Terps’ 2021 recruiting class, now ranked 13th nationally by 247 Sports.

McDonald attends nearby St. John’s College High School and is the third 2021 commit from the Cadets. He will be joining teammates Taizse Johnson — a defensive tackle — and Antwain Littleton — also a running back — at Maryland, along with 2020 five-star wide receiver Rakim Jarrett.

The 5-foot-10, 200-pound back was All-Met honorable mention last year as a junior.

[Read more: Division III quarterback Evan Lewandowski transfers to Maryland football]

The Terps’ running back room is shallow after Anthony McFarland and Javon Leake left for the NFL and Lorenzo Harrison medically retired. Tayon Fleet-Davis and Jake Funk now stand as the only returning backs with game experience at the college level.

But with both Fleet-Davis and Funk set to graduate after the 2020 season, McDonald and Littleton will get a chance to compete for a starting spot upon their arrival to College Park.