Minnesota Vikings third-string quarterback Taylor Heinicke is on the active/non-football injury list to start training camp.

The Vikings also put offensive lineman Mike Harris on the active/non-football illness list Friday. Defensive tackle Kenrick Ellis and tight end Rhett Ellison are on the active/physically unable to perform list.

Heinicke has a cast on his left foot for a severed tendon in his ankle, a freak injury that occurred a few weeks ago. Shaun Hill and Joel Stave are the other backups to Teddy Bridgewater.

Coach Mike Zimmer said Heinicke will be out “a while.” Zimmer declined to specify the “little medical issue” that has sidelined Harris.

Ellison tore the patellar tendon on his right knee in the Jan. 3 game at Green Bay.