* Jason Marquis' next start has been pushed back from Friday to Tuesday because of a blister on his right middle finger. Troy Renck of the Denver Post reports that Marquis has "battled the issue for the better part of a month," but it hasn't stopped baseball's only 12-game winner from going 3-1 with a 1.16 ERA in his last four starts.
* In other Colorado pitching news, 43-year-old Mike Timlin has been working out for the Rockies in the hopes of landing a minor-league contract.
* Michael S. Schmidt and Alan Schwarz of the New York Times wrote a lengthy article examining how MLB "is conducting genetic testing on some promising young players and their parents" in Latin American countries.
* Joe Crede rejoined the Twins' lineup last night after missing two games with a sore shoulder, went 2-for-5 with a pair of doubles, and is now unavailable again while scheduling a visit with Dr. Lewis Yocum.
* Cameron Maybin is hitting .341 in 56 games at Triple-A, but Juan C. Rodriguez of the South Florida Sun Sentinel speculates that the Marlins haven't called him up because they're suppressing his service time to delay his eventual arbitration eligibility.