In the year 2000, the Astros' Roy Oswalt had one of the best seasons ever for a rookie pitcher. He was 14-3 with a 2.73 ERA and a 1.05 WHIP. In 141 1/3 inning pitched, opponents hit just .191 against him. His WAR on baseball-reference.com was 4.8, exactly 1.0 better than Kerry Wood's WAR in 1998, the year Wood won Rookie of the Year. But in 2000, Oswalt didn't even get one first-place vote for ROY.
It wasn't Oswalt's fault that he arrived to the National League the same year the rookie Pujols slashed .