A college football career that began four years ago with such promise ended with little fanfare Monday when redshirt junior running back Lorenzo Harrison III announced on social media that he was “medically retiring” from the sport.

“All good things must come to an end,” Harrison tweeted.

Harrison, who began his college career in 2016 by becoming the first freshman in school history to score touchdowns in four straight games and seemed poised to break LaMont Jordan’s freshman rushing record, missed most of the past two seasons with injuries.

In a statement released by the team, Maryland coach Mike Locksley said: “I’ve known LoLo [Harrison’s nickname] since he was in high school and you won’t find anyone with more passion for the game of football. I know this was a very tough decision for him and his family. We will continue to support him in any way we can and I’m very confident he’ll be successful in anything he puts his mind to. LoLo will always be a Terp.”

As a freshman, Harrison teamed with junior Ty Johnson to help the Terps to a 4-0 start under first-year coach DJ Durkin and give Maryland one of the best rushing tandems in the Big Ten.

Harrison, who started the season buried on the depth chart, rushed 88 times for 643 yards and five touchdowns, but missed the last four games after being suspended along with former DeMatha High teammate DJ Turner.

Because of the suspension, Harrison missed a chance to break Jordan’s freshman record of 689 yards, which was shattered two years ago when redshirt freshman Anthony McFarland Jr. rushed for 1,034 yards.

Harrison and Turner were reinstated shortly after the Terps finished a 6-7 season with a bowl loss to Boston College, and charges that stemmed from an incident in which the two players allegedly shot an air rifle on campus were dropped for “insufficient evidence,” according to the Prince George’s State’s Attorney.

Harrison returned the following season, finishing with 622 yards and three touchdowns on 137 carries. He finished his Terps career with 1,409 rushing yards on 242 carries (5.8 yards per carry) and nine touchdowns and caught 20 passes for 108 yards.

Two years ago, Harrison played in just two games before it was announced that he would miss the remainder of the season with what his father later described as a “minor knee injury” that required surgery.

Last season, Harrison also played in two games, suffering a torn MCL and a partially torn ACL on his only carry in a 59-0 loss to No. 10 Penn State.