I would have to disagree with all of you and go with the guys on PTI. There is a huge psychological part of the game and if a player can come up big in key situations, OPS doesn't measure any of that. Since the object of baseball is to score more runs than the other team, the players who get runs should be considered among the best. If you're measuring the overall talent of a player, then OPS is great. But if you want to see who is clutch, RBI is the best stat to measure that. Is Derek Jeter known for having a great OPS in his career? I'm sure it's good, but he's known for coming up big in key situations and that is why he is among the best in the game in the last decade. Going to basketball, there are many players who score 20 points a game, but they aren't reliable in teh 4th quarter. Who do you want? I'll take the 4th quarter clutch player in Kobe Bryant over the Allen Iverson who scores 30 a game but has hit less than 5 buzzer beaters for a win in his career. The overall point is that there are intangible parts to the game that are more important, and RBI's is a great indicator of this and should be considered the most important stat.