As the MLB season progresses into Week 4, savvy fantasy players are scouring the waiver wire for potential impact picks. Notable additions include Austin Hays, who is on fire with a .361 batting average, three homers, and nine RBIs in his last nine games. The Athletics have called up Nick Kurtz, who made an immediate impact with an RBI single in his debut, and the Marlins' Agustin Ramirez is off to a hot start after hitting 5-for-6 with three doubles in his first two games. With injuries piling up, especially for the Texas Rangers, these players could provide essential depth to fantasy rosters as they look to capitalize on emerging talent.