The St. Louis Rams on April 29 signed defensive back Jerome Carter, a fourth-round choice from Florida State.
Coston was the 143rd player selected overall in the draft. The contract is for five years, according to Coston's agent, Bardia Ghahremani. Safety Erik Coleman of the New York Jets, last year's 143rd overall pick, signed a four-year deal that included a $165,000 signing bonus.
Most NFL draft picks sign contracts in June and July.
Coston, a 6-foot-3, 317-pound lineman out of North Carolina A&T, played center and guard in college, where he earned first-team All-Mid Eastern Athletic Conference honors. The durable Coston started his final 41 college games for an A&T rushing game that averaged 4.5 yards per carry over that span. He is the first of 1,242 Packers draft choices from that school.
Coston, the first cousin of tight end David Martin, played guard in 2001, tackle in 2002 and center in 2003-04. He had 154 knockdowns in 2003 and 123 knockdowns in 2004.