Chicago, IL (Sports Network) - Chicago Cubs starting pitcher Mark Prior was transferred Friday from the 15-day disabled list to the 60-day DL. He is eligible to be activated on June 3.
Prior has been sidelined since the beginning of the season due to an inflamed right Achilles' tendon.
He tossed 30 pitches over two innings of a simulated game on Wednesday and was expected to throw again on Monday in Arizona. Prior will then join the team in Los Angeles on Tuesday for a bullpen session with pitching coach Larry Rothschild.
Prior started 30 games in 2003 for the Cubs and went 18-6 with a 2.43 ERA. He owns a career record of 24-12 with a 2.74 earned run average over 49 contests.
In a related move, the club purchased the contract of infielder Damian Jackson from Triple-A Iowa. Jackson will help fill in for injured shortstop Alex Gonzalez, who could miss up to six weeks with a broken bone in his right wrist.