Complete bullshit. Baseball players, you might have noticed, wear uniforms and caps. The only exposed skin is the arms, the face, and the back of the neck.
The only way I would believe this is if you could provide objective and verifiable evidence, with a sufficiently large sample size, that black players play better in the summer than white players, relative to career norms. We should also see black players performing better while playing for teams in hot climates, like Arizona or Houston, than with teams in cold climates or under domes, like Toronto or Minnesota. (You’ll recall how much Kirby Puckett sucked in Minnesota, or how lousy Carlos Delgado was in April and May.)
For fun, I selected at random 20 ballplayers, all regular position players, 10 white and 10 black. I have divided them into cold and warm climate teams (5 white and black) and then examined their OPS by month. (I just came up with names off the top of my head, but I took them only if they had stayed relatively injury-free this year, so we have lots of data.) Logically, if Dusty Baker is correct, the black players should show an inrease in production relative to the white players in June, when it is warmer than in April or May. And Asians, too. Japan isn’t a tropical country. So I threw in Ichiro.
White or Asian Players/Cold Climate or Dome:
Corey Koskie, Minnesota - April .821, May .751, June 1.146
Frank Catalanotto, Toronto - April .856, May .879, June .740
Brad Wilkerson, Montreal - April .906, May .905, June .966
Jason Giambi, New York - April .699, May .871, June 1.373 (!!!)
Ichiro Suzuki, Seattle - April .623, May .973, June .935
White/Warm Climate:
Lance Berkman, Houston - April .656, May .941, June 1.147
Junior Spivey, Arizona - April .655, May .800, June .906
Shawn Green, Los Angeles - April .793, May .813, June .573
Ryan Klesko, San Diego - April .895, May .809, June .836
Chipper Jones, Atlanta - April .853, May .948, June .891
Note that “April” includes a few March games. I see no evidence whatsoever than white player do worse in the hotter month of June than in the colder months.
Do black players improve relative to their white brethren?
Black/Cold Climate or Dome
Vernon Wells, Toronto - April. 756, May .922, June 1.083
Mike Cameron, Seattle - April .740, May 1.016, June .843
Torii Hunter, Minnesota - April .697, May .802, June .788
Barry Bonds, San Francisco - April 1.165, May 1.083, June 1.158
Frank Thomas, Chicago - April .927, May .863, June 1.146
Black/Warm Climate or Dome
Carl Everett, Texas - April 1.161, May .893, June .662 (Traded to Chicago in July)
Gary Sheffield, Atlanta - April 1.064, May 1.061, June .964
Edgar Renteria, St. Louis - April .946, May .811, June .892
Garrett Anderson, Anaheim - April .941, May .749, June 1.135
Tony Womack, Arizona - April .513, May .591, June .720
I see no evidence whatsoever that black players have an advantage in warmer weather. I tlooks to me as if there is an oversall boost in HITTING for both white and black players, which is consistent with common sense and accepted wisdom, but that may just be random chance. IT seems to me that the June performances of white guys like Lance Berkman and Jason Giambi are as good as any hot streak a black player’s come up with.
It is also interesting to note that the world’s greatest black ballplayer, Barry Bonds, plays in arguably the coldest ballpark in the majors, Pacific Bell Park. The stadium is notoriously, uncomfortably cold; night games in July and August will dip below 60 degrees. Doesn’t hurt the black guys. The world’s greatest white ballplayer, Alex Rodriguez - unless he’s Latin, but he looks to me like his skin is pretty white, and Baker was talking skin color - plays in the league’s HOTTEST ballpark, the Ballpark at Arlington. And interestingly enough, he has always performed better in his hot home park than in cooler road parks.
Baker is a good manager but he is totally full of shit on this one.