MIAMI — Four-time Pro Bowl running back Arian Foster took a big step Monday in his comeback from a torn Achilles tendon.

He found a team.

Foster signed a $1.5 million, one-year contract with the Miami Dolphins, and said he’s fully healthy.

“I still feel like I’m a Pro Bowl-caliber player, and I intend to show it,” Foster said.

Foster, who spent the past seven years with the Houston Texans, was hurt in Game 7 last year at Miami. He paid a free-agent visit to the Dolphins in March and accepted an offer after working out for them Monday.

Miami was looking to add depth at running back following the loss of Lamar Miller to the Texans in free agency.

“After my visit with Miami, I kind of made my mind up that that was where I wanted to be,” Foster said. “I see a lot of promise in this team and feel like I add value.”

Jay Ajayi is expected to start after rushing for 187 yards as a rookie last year. Foster will likely compete for a backup role with third-round pick Kenyan Drake and veterans Daniel Thomas and Damien Williams.

Injuries have limited Foster to a total of 25 games in the last three years, and he played in just four games last season, averaging 2.6 yards per carry. He holds the Texans’ franchise record with 6,472 yards rushing, but he’ll turn 30 next month.

LONGTIME BEARS cornerback Charles Tillman is retiring after 13 seasons.

Tillman spent his first 12 seasons with the Bears and went to two Pro Bowls. He started 12 games last season with the Carolina Panthers before suffering a season-ending knee injury and missing the team’s run to the Super Bowl.

EAGLES: Marion Campbell, who played on Philadelphia’s last NFL championship team in 1960, has died. He was 87.

Campbell, a two-way player and two-time Pro Bowl pick, played for the Eagles from 1956-61. He was the team’s head coach from 1983-85 and later coached the Atlanta Falcons from 1987-89.

THE NFL will test computer chips in footballs this preseason to determine how well the balls perform, particularly in the kicking game.

Data collected from the chips also could help with officiating in the future, including goal-line and short-yardage plays.