Three more of the Vikings rookies signed their contracts on Wednesday.
Then Wednesday evening, Minnesota's third round pick DE Scott Crichton sent out a tweet of him signing his first professional contract.
Barr was the Vikings first round pick (#9 overall) out of UCLA. As a senior, he was a finalist for the Butkus (top LB), Lombardi (best DL or LB) and Bednarik (best defensive player) Awards and was a consensus All-American.
Crichton was one of two third round picks selected by the Vikings in the NFL Draft. Crichton is out of Oregon State and finished his career as the Beavers' all-time leader in forced fumbles and ranked third in sacks (22.5).
Exum was the Vikings 6th-round selection (#182 overall), out of Virginia Tech. He started 35-of-44 games during his college career and was 2nd-team All-ACC in 2012 after intercepting a career-high five passes. He played in just three games in 2013 due to an injury.
That leaves only RB Jerick McKinnon as the only unsigned Vikings draft pick.