Shop Men's at RalphLauren.com, the Official Site of Ralph Lauren. Cotton Poplin Baseball Jacket - Inspired by vintage collegiate styles, this baseball jacket is crafted from smooth cotton poplin and features a sporty crackled screen-print. Striped rib-knit baseball collar. Full-zip front. Long sleeves with striped rib-knit cuffs. Welt pocket at each hip. Crackled "NY Athletic Division" is screen-printed at the left chest. Striped rib-knit hem.