How about his worst 5?
Not even counting his last two where he hardly played, his BA were:
.063, .158, .200, .214, .222
You play in 14 playoffs (WS only for Yogi) you're bound to have good years sometime. Heck, look at A-Roid! He's had some good postseasons with Seattle and NYY and he certainly isn't any Mr. October. Here's his top five averages in any series out of 10 (ALDS, ALCS) .455, .421, .409, .368, .313.
Things that make you go