Vikings guard Josh Samuda suffered a gruesome ankle injury during today's voluntary offseason workout. The 25-year-old broke his fibula and dislocated his right ankle, according to a league source. He could also have ligament damage.

He will undergo surgery Wednesday morning. Doctors will find out the full extent of the injury then.

Samuda was participating in a non-contact drill in which one player chased another in a tight circle. He twisted his ankle, collapsed on the turf and clutched his leg, obviously in a great deal of pain. After a few minutes, he was helped off the field and taken into the trainer's room.

The workout was open to the media, and an image of Samuda's ankle quickly went viral.

Samuda signed a reserve/future contract with the Vikings in January. He played 16 games for the Miami Dolphins in 2012 after signing as a rookie free agent out of Massachusetts. He did not play in 2013 after the Dolphins waived him before the start of the season.

In other news, the Vikings signed tight end Allen Reisner, who played for them in 2011 and 2012.

Reisner, 25, spent his first two seasons with the Vikings after they signed him as a rookie free agent out of Iowa. He played 10 games over two seasons, making two catches for 28 yards. The Jacksonville Jaguars signed him off the Vikings' practice squad late in the 2012 season and he played five games for them in 2013, making three starts and catching five passes for 40 yards.

The Vikings also worked out Towson running back Terrance West today, according to a league source. West, 23, set the Div. I FCS single-season rushing record in 2013 with 2,519 yards.