First-year head coach Kliff Kingsbury remained tight-lipped about the possibility of the Arizona Cardinals bringing in free agent wideout Michael Crabtree on Tuesday at the team's practice.

Kingsbury, who turns 40 years old on Friday, told reporters “Anything can happen” regarding Crabtree, a veteran wide receiver released by the Baltimore Ravens earlier in the year. Crabtree, 31, worked out for the team already—and despite some reporting, he signed with the Cardinals—a marriage between the two parties is not official yet.

Crabtree is a 6-foot-1 wideout who last played for the Ravens in 2018 after a three-year stint with the Oakland Raiders. Prior to his time in silver black, the former first-round pick competed for the other Bay Area team—the San Francisco 49ers. The Niners selected Crabtree with the 10th overall pick in the 2009 NFL Draft.

Despite never making a Pro Bowl or All-Pro team, Crabtree has had a solid professional career 10 years into his NFL tenure, with several teams like the Dallas Cowboys, and both former teams in 49ers and Raiders mulling interest in the Texas Tech product. San Francisco released veteran wideout Pierre Garcon earlier this year, and the Raiders are still short on receiver prospects outside of Antonio Brown after they traded former first-rounder Amari Cooper to Dallas last season.

Last year for Baltimore, Crabtree appeared in all 16 games, recording 54 receptions for 607 yards, three touchdowns, and 11.2 yards per reception. The Ravens released the 31-year-old one year after inking him to a three-year deal worth $21 million.