Each week during the season Athlon Sports looks at the best and worst baseball teams and players in the league. Here's our MLB Power Rankings and Players of the Week for Sept. 3, 2012.

Each week during the season Athlon Sports looks at the best and worst baseball teams and players in the league. Here's our MLB Power Rankings and Players of the Week for August 27, 2012.

 1. Nationals — Is there some friction among management?

Each week during the season Athlon Sports looks at the best and worst baseball teams and players in the league. Here's our MLB Power Rankings and Players of the Week for August 20, 2012.

 1. Nationals — Opponents are batting .210 with runners in scoring position.

Each week during the season Athlon Sports looks at the best and worst baseball teams and players in the league. Here's our MLB Power Rankings and Players of the Week for August 13, 2012.

Each week during the season Athlon Sports looks at the best and worst baseball teams and players in the league. Here's our MLB Power Rankings and Players of the Week for August 6, 2012.

 1. Reds — Aroldis Chapman toughest pitcher in majors.

Each week during the season Athlon Sports looks at the best and worst baseball teams and players in the league. Here's our MLB Power Rankings and Players of the Week for July 30, 2012.

  1. Reds—Everything falling into place in Cincinnati.

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A’s
A’s, as in the Oakland Athletics, are in a pennant race for the first time since 2006. We have the second wild card to thank for this, but the no-name A’s have been the hottest team since July 1. It’s amazing what can be accomplished when you assemble a competent pitching staff.

Each week during the season Athlon Sports looks at the best and worst baseball teams in the league. Here's our MLB Power Rankings for July 23, 2012.

  1. Rangers—Still the scariest team in the American League.

Each week during the season Athlon Sports looks at the best and worst baseball teams in the league. Here's our MLB Power Rankings for July 16, 2012.

  1. Rangers—All-Star Matt Harrison pitching like Cy Young Matt Harrison.

Each week during the season Athlon Sports looks at the best and worst baseball teams in the league. Here's our MLB Power Rankings for July 9, 2012.

  1. Rangers—Scored fewest runs so far in July.