Four University of Wisconsin football players appear set to switch positions this spring, according to the Badgers' spring practice roster that was posted to on Thursday.

The posted roster was not finalized and was removed from the website shortly after it appeared. A UW official clarified that a finalized roster will be made available when the Badgers begin spring practice Tuesday.

Arrington Farrar was listed as moving from inside linebacker to outside linebacker, Deron Harrell from wide receiver to cornerback, Jake Collinsworth from inside linebacker to fullback and Paul Jackson from wide receiver to outside linebacker.

The most notable is Farrar, a rising senior who played as a true freshman at safety in 2015 but never made a major impact at the position. He switched to inside linebacker last year and served as the No. 4 player at that spot for much of the season.

Both of UW's starting outside linebackers in 2017 -- Garrett Dooley and Leon Jacobs -- were seniors and are no longer on the team.

Harrell and Collinsworth are also switching to positions where the Badgers lost key players and are looking for more depth.

Inside linebacker Nick Thomas, fullback Jake Whalen, wide receiver Peter Roy and safety Blake Mielke were not listed on the spring roster. The State Journal reported earlier Thursday that defensive lineman Billy Hirschfeld will not return for his senior season.

Sophomore quarterback Jack Coan switched his number from 10 to 17, per the roster.