The most intriguing NFL supplemental draft class in years received yet another boost Friday with Grand Valley State running back Martayveus "Marty" Carter joining the party, has confirmed.

Carter was being counted on to be a key component of Grand Valley State's attack in 2018, with no indication as of the team's spring game on April 16 that he would be pursuing his NFL dream early.

That isn't to say that scouts are unfamiliar with the 5-foot-11, 200-pound Carter, who rushed for 957 yards and nine touchdowns on 122 carries last season, good for 7.84 yards per carry.

Carter was even better as a redshirt sophomore, leading Division II in rushing yards (1,908) and rushing touchdowns (20) in 2016, earning All-American honors and finishing fifth in voting for the Harlon Hill Award, the D-II version of the Heisman Trophy.

Carter comes with all of the usual questions about level of competition, but the tape shows an elusive back with legitimate burst. He caught a career-high 16 passes last season and currently checks in 36th among 2019 running backs on's board.

Carter and Oregon State linebacker Bright Ugwoegbu were formally added to the list of players eligible for the draft this week, joining defensive backs Sam Beal (Western Michigan), Adonis Alexander (Virginia Tech) and Brandon Bryant (Mississippi State).

Beal is the only player considered a lock to be drafted on July 11. All 32 NFL teams were represented at his Pro Day workout Thursday, with the Cleveland Browns notably being represented by general manager John Dorsey.

Alexander, Bryant and now Carter may also earn late-round conservation.

A player has not been selected in the supplemental draft since 2015, when the St. Louis Rams invested a fifth-round pick in Clemson offensive tackle Isaiah Battle.

There has been more than one player selected in the supplemental draft just twice since the turn of the century, most recently in 2010 when Chicago Bears drafting BYU running back Harvey Unga and the Dallas Cowboys selecting Illinois defensive tackle Josh Brent, both going in the seventh round.