After losing Andy Pettitte to the Yankees, he Astros are desperate for pitching help and are expected to revisit trade discussions for Rockies right-hander Jason Jennings. The Rockies have made their preference known. To move Jennings, last year's opening day starter, they'd like young right-handed starter Jason Hirsch, 24, and either center fielder Willy Taveras or reliever Dan Wheeler. "It has to be a good baseball deal," Rockies general manager Dan O'Dowd said this week. "We aren't trading him for A-ball prospects."