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05/29/09 8:20 PM ET

Bullpen lets Rangers slip away in opener

A's righty Casilla yields back-to-back homers in eighth

ARLINGTON -- Santiago Casilla made two costly mistake pitches that cost the A's in a 6-3 loss to the Texas Rangers on Friday in the first half of doubleheader at Rangers Ballpark in Arlington.

Casilla came into the game to start the bottom of the eighth with the score tied at 3. Starter Josh Outman had already racked up nine strikeouts. Michael Wuertz had gotten one of the American League's toughest outs, Michael Young, to fly out with the bases loaded to end the seventh.

Casilla wasn't able to keep the momentum going. After walking Josh Hamilton on four pitches, Casilla gave up a two-run home run to Andruw Jones. Jones' drive hit off the left-field foul pole. Casilla then turned around on a 1-2 pitch and watched as Nelson Cruz crushed a home run the opposite way into the right-field seats for a 6-3 lead.

Outman gave up only three hits in 6 2/3 innings, but left the game with the score tied at 3. With one out in the bottom of the seventh, Outman gave up a solo shot to Marlon Byrd. Outman was gone two batters later after he walked Jarrod Saltalamacchia.

Todd Wills is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.