#31 on the current roster is Redshirt Freshman Running Back
Josh Franke
I don't have an official photo of him from athletics yet, but here's a photo from Hudl:

He's listed as a MLB and DE on Hudl, but a RB for us, so idk if he did a lot of working out to be more of a big RB-type guy, or what. He's listed on our site as 6'0" and 246 lbs. Josh is an Accounting major from Litchfield, IL.
Other #31's in Leatherneck history include:
Peter Hittmeier.......................1961-62
Jack Hughes................................ 1966
Michael Moore............................. 1969
Charlie Boston........................1971-73
Mike Decker................................ 1974
Percy Tompkins......................1979-82
Todd Auer.................................... 1983
Dean Dalton................................ 1984
Derek Swanson........................... 1986
Mario Malone..........................1990-92
Ryle Irish................................2000-02
Phil Archer................................... 2003
Justin Poma................................. 2004
Eric Lines......................2005-06, 2008
Patrick Smith..........................2010-12
Luke Otto................................2014-15
Charlie Boston has the 3rd best (tied) season for interceptions in Leatherneck history with 7 in 1973. He also is 4th (tied) on the career interceptions list with 11.
Percy Tompkins was a second team All-Conference DB in 1981. He has the 6th longest interception return with an 80-yard return against Northeast Missouri State in 1981. His 16 passes broken up in 1982 ties him for the most in a season and his 12 in 1981 ties him at 6th in the same stat. He has 10 career interceptions (tied for 6th) and 36 career passes broken up (tied for 1st).
Todd Auer was a second team All-Conference DL and named to the National Strength Team in 1985. He was first team all-conference in 1986 as well as being a CoSIDA Academic All-American, FB Gazette First Team, Kodak First Team, AP Honorable Mention, and AFCA First Team. He is tied for 7th on the list of most sacks in a season with 11 in both 1984 and 1986. In his career, he had 162 solo tackles (10th on the list), 36 tackles for loss (9th), and 28 sacks (#1 by 7 sacks over #2). Following his Leatherneck career, he was picked up by the Green Bay Packers but only ended up playing in 3 games for them. He then went into coaching and is currently the defensive coordinator at
Western State Colorado.
Derek Swanson was discussed in
the #33 post a couple of days ago.
Ryle Irish was a Macomb native that was the team's interceptions leader in 2001. As a DB, he snagged 3 interceptions that season.
Phil Archer was named to the conference All-Newcomer team and second team All-Conference in 2003. That season, he finished with 102 solo tackles, ranking him tied for the 3rd best performance for a season.
Eric Lines received the conference's President's Academic Excellence Award in 2008.