Since 1998, there have been 30 teams in major league baseball. It is very rare for a pitcher to record a win against every team. In earlier times, two things conspired to make it nearly impossible to defeat all teams in both leagues (even before expansion increased the number to 30):
Before the era of free-agency, in which players are free to move to another team at the end of their contract, a pitcher would play for only a few teams, and could not, of course, win a game against his own team.
Before inter-league play, a pitcher would see only half of the 30 teams in any single season, unless traded to a team in the other league. Even with inter-league play, a pitcher may not have his spot in a typical 5-man rotation match the games in the single 3- or 4-game series against another team, and only a few teams from the other league are played in any season.
In any case, defeating all teams is more likely only if a pitcher has a long career. Assuming a top notch pitcher manages to win against every team in a season, it will still only be 19 teams, unless he was traded. It is far more likely that his wins will come against 10 to 12 teams, most of which he has already beaten.
As of May 11, 2016, there have been 17 pitchers who have beaten all teams. The San Francisco Giants are the only franchise with three players who accomplished the feat while on their roster: Randy Johnson, Barry Zito, and Tim Hudson.
1. Al Leiter, April 30, 2002
2. Kevin Brown, March 31, 2004
3. Terry Mulholland, July 3, 2004
4. Curt Schilling, September 10, 2004
5. Woody Williams, September 26, 2006
6. Jamie Moyer, May 26, 2008
7. Randy Johnson, April 19, 2009
8. Barry Zito, June 12, 2010
9. A.J. Burnett, July 21, 2012
10. Javier Vázquez, July 21, 2010
11. Vicente Padilla, August 10, 2010
12. Derek Lowe, May 10, 2012
13. Dan Haren, August 9, 2013
14. Kyle Lohse, June 26, 2015
15. Tim Hudson, July 26, 2015
16. John Lackey, April 18, 2016
17. Max Scherzer, May 11, 2016
As of January 16, 2017 nine active pitchers have defeated 29 teams.
Bartolo Colon - has not defeated the Arizona Diamondbacks.
CC Sabathia - has not defeated the Miami Marlins.
Zack Greinke - has not defeated the Kansas City Royals.
Ervin Santana - has not defeated the Milwaukee Brewers.
Ubaldo Jimenez - has not defeated the Colorado Rockies.
Francisco Liriano - has not defeated the Miami Marlins.
Jake Arrieta - has not defeated the Chicago Cubs.
J.A. Happ - has not defeated the Los Angeles Dodgers.
Scott Kazmir - has not defeated the Milwaukee Brewers.
As of January 16, 2017, four active pitchers have defeated 28 teams.
R.A. Dickey - has not defeated the Colorado Rockies and Chicago Cubs.
Edwin Jackson - has not defeated the Atlanta Braves and San Diego Padres.
Joe Blanton - has not defeated the New York Yankees and Oakland A's.
Jon Lester - has not defeated the Boston Red Sox and Miami Marlins.
As of January 16, 2017, three active pitchers have defeated 27 teams.
Jake Peavy - has not defeated the Los Angeles Angels of Anaheim, New York Yankees, and Texas Rangers.
Gio Gonzalez - has not defeated the Chicago White Sox, Oakland A's, and Washington Nationals.
Chris Young - has not defeated the Cincinnati Reds, New York Mets, and Texas Rangers.
Matt Garza - has not defeated the Los Angeles Angels of Anaheim, Los Angeles Dodgers, and Tampa Bay Rays.
As of January 16, 2017, the following active pitchers have defeated 26 teams.
Justin Verlander - has not defeated the Cincinnati Reds, Detroit Tigers, Miami Marlins, and San Francisco Giants.
James Shields - has not defeated the Cincinnati Reds, Pittsburgh Pirates, St. Louis Cardinals, and Washington Nationals.
Anibal Sanchez - has not defeated the Los Angeles Angels of Anaheim, Detroit Tigers, Los Angeles Dodgers, and San Diego Padres.
Edinson Vólquez - has not defeated the Baltimore Orioles, Kansas City Royals, Texas Rangers, and Toronto Blue Jays.
