Baylor jumps into my rankings at 4-0 with a win over Iowa State (2-2). They play Oklahoma State this weekend for a chance to make another statement. 
Their first three games were against easy opponents so it was tough to tell how legit Baylor is, but they're undoubtedly a top 25 after beating Iowa State
Baylor's quality win comes against the now-unranked Hawkeyes, but they've got 2 ranked matchups in 3 weeks. I haven't watched much (any?) of Baylor this year but again, they're going to have a shot to make a case for "Best of the Rest" in the Big XII.
Baylor is 4-0 and they beat Iowa State this week. Iowa State wasn't ranked for me but it is still a solid win. The Big 12 is shaping up to be a little tougher this season than expected, so we'll see how Baylor navigates through their schedule.