Waiver Wire Watch returns with four standout under-40% rostered MLB adds. Colson Montgomery sits at 39% rostered, carrying a big upside despite a recent dip in contact; his 119 Process+ since mid-July signals a hitter with power and a chance for a steady role. Sal Frelick is a daily job in Milwaukee, piloting a 18-steal pace and a .294 clip in his last 15 games, making him a dependable multi-category asset. Jordan Beck has surged for Colorado, hitting .326 with four homers and 13 RBI across 26 games, and the Coors Field factor only heightens his upside. Lenyn Sosa is entrenched in an everyday role with a 113 Process+ since July 15, delivering a .293/.343/.511 line with four homers in 25 games. These names offer a mix of safety and upside for mixed leagues seeking cheap wins down the stretch.