Mark Prior tested his elbow in a 10-minute pregame throwing session from the bullpen yesterday and emerged relatively pain free.

Prior, forced out of his start last Thursday when he felt discomfort in the elbow during the second inning, was originally scheduled to pitch tomorrow against St. Louis.

The Cubs won't determine his status until today to see how he rebounds from yesterday's workout. Prior declined to comment.

"He let it go pretty good today and it was good to see him be able to do that and not have it barking at him at all. We'll see how he is tomorrow and go from there," Cubs pitching coach Larry Rothschild said.

* HALLADAY STILL AILING: Blue Jays RHP Roy Halladay will have his sore right shoulder examined by James Andrews today in Birmingham. A day after saying the 2003 AL Cy Young Award winner was still on track to make his next scheduled start on Wednesday against the Yankees, Blue Jays Manager Carlos Tosca was more doubtful yesterday. "It's not likely he'll make the start on Wednesday," Tosca said.

* TRADE: Carl Everett rejoined the White Sox when the switch-hitting outfielder was traded from the Expos for minor league Ps Jon Rauch and Gary Majewski.

-- From News Services