The Tigers traded Jason Grilli to the Rockies on Wednesday for minor league pitcher Zachary Simons, as reported by the Associated Press. The right-handed Grilli is 0-1 with a 3.29 ERA in nine games this season. He has a 13-13 record with a 5.08 ERA in 135 career games, with 16 starts.

The Kansas City Royals have traded left-handed pitcher Jorge De La Rosa and cash to the Colorado Rockies in exchange for a player to be named. Since De La Rosa is not currently on the Royals 40-man roster, he will be assigned from Omaha to the Class AAA Colorado Springs roster. De La Rosa, 27, has spent the opening portion of the 2008 season with Omaha (AAA) and went 3-0 with a 1.64 ERA (22 IP, 18 H, 4 ER, 7 BB, 23 SO) in four starts. The resident of Nuevo Leon, Mexico was 11-16 with a 5.64 ERA in 36 outings (33 starts) for the Royals in 2006 and 2007 after being acquired on July 25, 2006 from Milwaukee for infielder Tony Graffanino.

The Rays addressed a need for some help in the outfield Tuesday, when they acquired Gabe Gross from the Brewers in exchange for minor league pitcher Josh Butler, as reported by the Associated Press.

The Red Sox on Tuesday acquired righthander Eric Hull from the Dodgers for infielder Christian Lara and cash, as reported by Yahoo.com. The 28-year-old Hull, who was designated for assignment by the Dodgers on March 31, went 4-3 with a 2.74 ERA in 49 games with Class-AAA Las Vagas in 2007, earning a September call-up and his major league debut with Los Angeles.

The Marlins on Saturday acquired Wes Helms in a trade from the Phillies for a player to be named later or cash, as reported by Yahoo.com. Helms returns to South Florida where he hit .329 with 10 home runs and 47 RBIs for the Marlins in 2006.