During the 2002 season when Oakland was using the famous "Moneyball" strategy, they largely looked to on-base-percentage when measuring player value, but this only seems to address how to look for offensive help rather than pitching. How did they discover pitchers like Chad Bradford? Did they use OBP against? WHIP?
Looking at Chad Bradford's statistics on Baseball-Reference dot com, his last season with the White Sox before being picked up by Oakland indicated that he would be a top performer. Having faced 52 batters that year:
- 0 home runs surrendered
- 17% strikeout rate
- an incredible 2.82 groundball-to-flyball ratio
- and a healthy 29% double-play on ground balls
Factor these stats in considering they got him on the cheap. Also he had a sidearm release point, something making it hard for batters to hit, especially relievers.