• When the Red Sox promoted first baseman Lars Anderson to Triple-A Pawtucket a week and a half ago, it didn't figure to be long before they would bring in Anthony Rizzo to take his spot.

The Red Sox made that move today, promoting Rizzo from high Class A Salem to Double-A Portland. Rizzo, 20, hit .248/.333/.479 in 29 games with Salem. He earned praise around the Carolina League for his glovework but perhaps more important was the power he showed, with five home runs and 12 doubles, after going deep just 12 times in 119 games last year between low Class A Greenville and Salem.

Anderson, meanwhile, hasn't slowed down upon his move to the International League—he's hitting .290/.450/.484 in 10 games for Pawtucket. Certainly not bad timing to be a productive first base prospect at the upper levels of the Red Sox system.

• Righthander Deolis Guerra hasn't turned out to be the top prospect some were expecting him to be when he came to the Twins from the Mets in the Johan Santana trade. Yet while his stuff isn't overpowering, he is doing at least one thing well: throwing strikes. Guerra, 21, received a promotion to Triple-A Rochester after posting a 3.07 ERA in 29 1/3 innings over five starts with Double-A New Britain, averaging just 1.2 walks per nine innings.

The Twins also promoted Australian righthander Liam Hendriks from low Class A Beloit to high Class A Fort Myers. Hendriks, 21, dominated the Midwest League with a 1.32 ERA, 39 strikeouts and four walks in 34 innings.