James Alvin Palmer (born October 15, 1945) is a retired American right-handed pitcher who played all of his 19 years in Major League Baseball (MLB) with the Baltimore Orioles (1965-67, 1969-84) and was elected to the Baseball Hall of Fame in 1990. Palmer was the winning pitcher in 186 games in the 1970s, the most wins in that decade by any MLB pitcher. He also won at least twenty games in each of eight seasons and received three Cy Young Awards and four Gold Gloves during the decade. His 268 career victories are currently an Orioles record.

In 1991, Palmer attempted a comeback with the Orioles. Palmer said that he wanted to make sure that he had not retired too early. ESPN, which was trying to cut expenses, had asked him to take a pay cut and to sign a three-year contract. Palmer said he would sign a one-year contract for less pay, but ESPN refused. "I wouldn't be here today if the broadcasting climate had been more to my liking. That was really my prime motivation, the fact that I no longer had that obligation", Palmer said during spring training.  Covering Palmer's spring training workouts, Richard Hoffer of Sports Illustrated said that Palmer's comeback was not entirely about money. He wrote that "it is fair to suspect that a certain vanity is involved." Hoffer said that Palmer "has failed to excite either ridicule or astonishment. He's in fabulous condition, no question. But no matter whom he lines up with on the row of practice mounds, there is more pop in the gloves of catchers other than his."  While working out at the University of Miami during his comeback attempt, Palmer was approached by Miami assistant coach Lazaro Collazo. Collazo reportedly told him, "You'll never get into the Hall of Fame with those mechanics." "I'm already in the Hall of Fame", Palmer replied. To help Palmer's pitching motion, Collazo and Palmer completed unusual drills that involved Palmer placing a knee or foot on a chair as he tossed the ball.  After giving up five hits and two runs in two innings of a spring training game, he retired permanently. Palmer said that he tore his hamstring while warming up for the game, commenting, "I'm not saying I wouldn't like to continue, but I can't", he said. "I heard something pop in my leg yesterday. It wasn't a nice sound. I don't know what that means, but I think it's going to play havoc with my tennis game." He retired with a 268-152 win-loss record and a 2.86 ERA.

Why did he have a comeback?
Palmer said that he wanted to make sure that he had not retired too early.