On April 23, Russell Martin homered twice and walked, raising his 2011 on-base percentage to .410 and his slugging to .723.Since then, Martin has gone 8 for 52 with nine walks, a .279 OBP and a .250 slugging.Martin is still having a better season than the man who replaced him on the Dodgers, Rod Barajas, but the difference between the two is shrinking. The power is there with Barajas, whose main problem continues to be his walks – only five (against 33 strikeouts) in 126 plate appearances.* * *I couldn't resist finding the irony in the fact that amid the maelstrom of poor-performing, massively paid Jorge Posada being dropped last in the Yankees' lineup and then pulling himself out of the game entirely, the player selected to replace him Saturday was Andruw Jones, who knows a