Who's hot and who's not in the Big 12

Posted by ESPN.com's Tim Griffin

Here’s a look at some of those who are sizzling and fizzling across the Big 12 after the first three weeks of the season.

Hot: Oklahoma's defense, which posted back-to-back shutouts for the first time since 1987.

Not: Baylor quarterback Robert Griffin, who produced a career-low 139 yards against Connecticut.

Hot: Iowa State’s special teams, which recovered two fumbles on Kent State punt returns last week.

Not: Iowa State’s offense, which has produced 10 turnovers in the last two games -- six interceptions and four lost fumbles.

Hot: Missouri wide receiver Danario Alexander, who became the first Tiger player to catch and throw a touchdown pass in the same game since Chase Coffman in the 2006 Sun Bowl.

Not: Kansas State’s offenses has scored 45 points in first three games -- lowest since Bill Snyder’s first season in 1989. The Wildcats had six drives that reached UCLA territory last week and came away with nine points.

Hot: Baylor linebacker Joe Pawelek, who contributed a career-high 21 tackles against Connecticut.

Not: Nebraska quarterback Zac Lee, whose first road game against Virginia Tech was one to forget. He completed 11-of-30 passes with two interceptions for 136 yards. It was the lowest Nebraska passing production since the Cornhuskers passed for 129 yards against Oklahoma State in 2007 -- a period of 20 games.

Hot: Oklahoma State punter Quinn Sharp, who is making Cowboy fans forget all about Ray Guy Award winner Matt Fodge from last season. Sharp had kicks of 50 and 61 yards last week against Rice, giving him six punts of 50 or more yards after three games. And six of his 12 punts this season have been downed inside the opponents' 20-yard line.

Not: Texas Tech running back Baron Batch, who gashed Texas for 18 yards on his first carry last week and produced five more yards during the rest of the game. Batch also struggled with two fumbles.