FOXBOROUGH — Wearing jersey No. 31, which was last worn by the not-so-immortal Sergio Brown, talented but troubled cornerback Aqib Talib made his much-anticipated debut at Patriots practice Wednesday at Gillette Stadium.

Talib, acquired Nov. 1 from Tampa Bay for a 2013 fourth-round draft pick, became eligible to join the team after serving a four-game suspension for violating the NFL’s performance-enhancing substance policy.