(Photo by Streeter Lecka/Getty Images)The Marshall football family is mourning a devastating loss this morning. Former Thundering Herd running back Devon Johnson has passed away at 25.Johnson was a standout for Marshall from 2012-15. The cause of his death is not immediately known.Marshall confirmed the news last night.“I am shocked and saddened at the news of Devon Johnson’s passing,” Marshall head coach Doc Holliday said in a statement. “Devon was a force in our program, both literally and figuratively. Whether on the field or off, his impact was immeasurable and he will be missed by so many at Marshall. Our thoughts and prayers go out to his friends and family.”Johnson’s high school, Richlands High School in Virginia, also paid tribute to him on Twitter.I don’t know how to even begin to out this into words…but we lost one of the greatest Blues to ever grace this earth tonight.Former Richlands, @HerdFB and @Panthers great Devon Johnson has passed away far too early.Please pray for this town.Say hey to #CT32 for us. ? pic.twitter.com/Mw8zdnoA1m— BlueTornadoLive (@BlueTornadoLive) November 6, 2018During his time at Marshall, Johnson set a school-record with 7.8 yards per carry. In 2014, he rushed for 1,767 yards and 17 touchdowns and was named a Doak Walker Award semifinalist and chosen for the First-Team All-Conference USA Team.Our thoughts and prayers are with Devon’s family and friends and the entire Marshall football community.