Keihn and Sutton will sit out this season due to NCAA transfer eligibility rules and be eligible for the 2016 season as redshirt sophomores.
"We are excited to welcome Melvin and Daniel to the Maryland football program," Edsall said in a statement. "Melvin has strong local ties to the area and it's great he will be continuing to play football and further his education in College Park."
Keihn, a defensive end, was granted his release from Virginia Tech last week and announced he was transferring to Maryland on Twitter on Tuesday night. Keihn, a Gilman graduate who was a two-time first-team All-Metro selection, played sparingly for the Hokies last season and finished with two tackles. Rivals rated him as a four-star outside linebacker and the fourth-best player in the state in his senior season.
Keihn is expected to compete for a starting job and make an impact in Maryland's new 4-3 alignment next season.
Sutton, a kicker, is a New Hope, Pa., native and didn't appear in any games for the Tigers last season. He was a three-time all-conference selection at New Hope Solebury High School and made 11 of 13 attempts in his career, including a 48-yarder. He was 67 of 72 on point-after attempts.
With Lou Groza Award winner Brad Craddock set to graduate after this season, Sutton joins sophomore Adam Greene and freshman Nicolas Pritchard on Maryland's roster.