Strange, I really thought they signed him to a one year deal.
It looks like he did:
http://www.spotrac.com/nfl/los-angeles-rams/lance-dunbar-10323/
Lance Dunbar signed a 1 year, $1,500,000 contract with the Los Angeles Rams, including $1,375,000 guaranteed, and an average annual salary of $1,500,000. In , Dunbar will earn a base salary of , a signing bonus of , a roster bonus of , a signing bonus of , a restructure bonus of , a workout bonus of and a incentive bonus of , while carrying a cap hit of and a dead cap value of .
Contract Terms: 1 yr(s) / $1,500,000 Signing Bonus - Average Salary$1,500,000 GTD at Sign:$1,375,000 Total GTD:$1,375,000 Free Agent:2018 /
Bonus Breakdown Cap Details Cash Details
Year Age Base Salary Roster Cap Hit Dead Cap Yearly Cash
2017
27 $1,000,000 $476,556 $1,476,556 - $1,406,248($1,406,248)
2018
28