This article was originally published on www.si.com/collectibles as 2 Key Rookie Autographs of Ryan Helsley as he joins the New York Mets.

Tigers pursued Cardinals' Ryan Helsley before Mets deal. As the MLB trade deadline nears, Detroit still eyes bullpen help.

The busy New York Mets remade the back end of their injury-depleted bullpen with two significant trades Wednesday, acquiring Tyler Rogers from San Francisco and Ryan Helsley from St. Louis. New York gave up six players for a pair of right-handed relievers who can become free agents in the fall,