Zack Greinke and Hanley Ramirez have already changed teams, and general managers still have a few more hours to make additional big trades. Some of the deals from the 2012 season may quickly be forgotten, but there's always the possibility of a blockbuster that can change the fortunes of a team for years. In honor of baseball's Tuesday trade deadline, here are some of the most famous (and infamous) in-season deals in baseball history — one for each of the 30 franchises.
July 2000: Acquired Curt Schilling from Phillies for Omar Daal, Nelson Figueroa, Travis Lee and Vicente Padilla.
Schilling was 33 at the time but had plenty left. He went 45-13 in 2001 and 2002, leading the Diamondbacks to a dramatic World Series title in '01 and finishing second in the Cy Young vote both years to teammate Randy Johnson.
July 1993: Acquired Fred McGriff from Padres for Donnie Elliott, Vince Moore and Melvin Nieves.
When the Braves traded for McGriff, the press box at old Atlanta-Fulton County Stadium literally caught fire the day he joined the team. The Braves followed suit, going 49-16 down the stretch to edge the Giants in the last great division race of the pre-wild card era.
June 1976: Acquired Rick Dempsey, Tippy Martinez, Rudy May, Scott McGregor and Dave Pagan from Yankees for Doyle Alexander, Jimmy Freeman, Elrod Hendricks, Ken Holtzman and Grant Jackson.
Dempsey, Martinez and McGregor were all key contributors to Baltimore's championship team of 1983, with Dempsey earning World Series MVP honors. McGregor won 20 games for the Orioles in 1980.
BOSTON RED SOX
August 1990: Traded Jeff Bagwell to Astros for Larry Andersen.
In one of baseball's all-time cautionary tales, Boston sent a future MVP to Houston for a 37-year-old reliever. With Andersen in the bullpen, the Red Sox did win a tight division race that year, but that was little consolation in the long run.
April 1966: Acquired Ferguson Jenkins, John Herrnstein and Adolfo Phillips from Phillies for Bob Buhl and Larry Jackson.
This was earlier in the season but still plenty important for the Cubs. Jenkins was used mostly as a reliever at this point in his career, but he was a regular starter by 1967, the first of his six straight 20-win seasons.
CHICAGO WHITE SOX
July 1997: Traded Wilson Alvarez, Danny Darwin and Roberto Hernandez to Giants for Lorenzo Barcelo, Mike Caruso, Keith Foulke, Bob Howry, Brian Manning and Ken Vining.
Dubbed the "white flag" trade because the White Sox were only 3½ games out of first place at the time, this deal actually didn't work out that badly for Chicago. Foulke, Howry and Barcelo pitched well out of the bullpen in 2000, when the White Sox won the AL Central.
May 1971: Acquired George Foster from Giants for Frank Duffy and Vern Geishert.
Foster became a crucial part of the Big Red Machine, helping the Reds win the World Series in 1975 and 1976 and winning the MVP in 1977. Of course, this wasn't Cincinnati's only big deal of 1971. After the season, they picked up Joe Morgan from Houston.
July 2011: Acquired Ubaldo Jimenez from Rockies for Joseph Gardner, Matt McBride, Drew Pomeranz and Alex White.
The jury is still somewhat out on this one, but the Indians may live to regret it if Pomeranz and White develop into stars. Jimenez has been erratic since going to Cleveland.
August 2004: Traded Larry Walker to Cardinals for Jason Burch, Luis Martinez and Chris Narveson.
Walker's terrific run in Colorado came to an end when he joined the pennant-bound Cardinals. None of the players the Rockies received has played a game for them.
August 1987: Traded John Smoltz to Braves for Doyle Alexander.
Alexander went 9-0 with a 1.53 ERA down the stretch for Detroit, helping the Tigers edge Toronto for the AL East title in a thrilling finish. But Smoltz, a Michigan native, became a star in Atlanta.
July 1998: Acquired Randy Johnson from Mariners for Freddy Garcia, Carlos Guillen and John Halama.
The Astros gave up a lot to bring in Johnson, but he delivered, going 10-1 with a 1.28 ERA for Houston. The Astros won the NL Central in a runaway, but Johnson left via free agency after the season.
KANSAS CITY ROYALS
July 2001: Traded Jermaine Dye to Rockies for Neifi Perez.
Dye ended up in Oakland after this three-way deal, and Perez played only one full season (2002) with the Royals. Dye had hit 33 homers in 2000, but Kansas City didn't get much value for him in the end.
LOS ANGELES ANGELS
July 2010: Acquired Dan Haren from Diamondbacks for Patrick Corbin, Rafael Rodriguez, Joe Saunders and Tyler Skaggs.
The Angels finished under .500 in 2010 even with Haren, but he went on to go 16-10 the following year and is still with the team. The trade for Greinke probably at least rivals this one.
LOS ANGELES DODGERS
May 1998: Traded Mike Piazza and Todd Zeile to Marlins for Manuel Barrios, Bobby Bonilla, Jim Eisenreich, Charles Johnson and Gary Sheffield.
Sheffield was a terrific hitter for the Dodgers for a few seasons, but Piazza would reach the World Series with the Mets two years later.
May 1998: Traded Mike Piazza to Mets for Geoff Goetz, Preston Wilson and Ed Yarnall.
Part II of Piazza's whirlwind in 1998. A week after he joined the Marlins, Florida traded him to New York for a fairly undistinguished haul. The Marlins went on to finish with 108 losses a year after winning the World Series.
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