Like a runner trapped between bases, the release date for a potentially scandalous Alex Rodriguez book keeps edging back and forth.

Selena Roberts' unauthorized "A-Rod" was originally planned for May, then was moved up to mid-April after Roberts, a Sports Illustrated reporter, broke the news that the Yankees slugger had tested positive for steroids back in 2003.

But with Roberts needing more time for the book which has been completed and was sent to the printer this week publication was pushed back to late April and now is planned for May 12, according to publisher HarperCollins.

"That's the on-sale date," publicist Leslie Cohen said Tuesday.