"Homer at the Bat" took a long time to produce.[5] It was written by John Swartzwelder, who is a big baseball fan,[6] but was suggested by Sam Simon, who wanted an episode filled with real Major League Baseball players.[5] Executive producers Al Jean and Mike Reiss doubted that they would be able to get nine players, thinking that they would be able to get three at best. They succeeded, and the nine players who agreed to guest star were recorded over a period of six months,[7] whenever they were playing the Los Angeles Dodgers or California Angels.[5] Each player recorded their part in roughly five minutes and spent the next hour writing autographs for the staff.[8] In several cases, the writers were unable to get the player who was their first choice.[5] Two of the players who turned down the chance to guest star were Ryne Sandberg and Carlton Fisk.[8]
Jose Canseco disliked the original part written for him in the episode and asked for it to be rewritten
All of the players were cooperative except for Jose Canseco, who was intimidating.[5] He disliked his original part and insisted it be rewritten, and the writers grudgingly[6] made him as heroic as possible.[5] He was originally slated to wake up in bed with Edna Krabappel and miss the game, but Canseco's then-wife, Esther Haddad, objected.[9][10] He disliked his caricature, stating that "the animation looked nothing like [him],"[9] but that he found the acting was very easy.[11] When asked in 2007 about his part by the San Jose Mercury News, he responded, "that was 100 years ago," hung up the phone and did not answer any of the paper's subsequent calls for an interview about his guest spot.[9]
Ken Griffey, Jr. did not understand his line "there's a party in my mouth and everyone's invited" and got quite frustrated when he was recording it. He was directed by Mike Reiss, and his father Ken Griffey, Sr. was also present, trying to coach his son.[7] Roger Clemens, who made his own chicken noises, was directed by Jeff Martin, as was Wade Boggs.[6] Mike Reiss directed most of the other players.[7] Mike Scioscia accepted his guest spot in "half a second," while Ozzie Smith has stated that he would like to guest star again "so [he] can get out [of the Springfield Mystery spot]."[11] Don Mattingly, who was forced to shave off his "sideburns" by Mr. Burns during the episode, would later have an actual "haircut controversy", while he was playing for the New York Yankees. The coaching staff forced him to cut his long hair, and was briefly dropped from the team line-up for not doing so. Many people believed the joke in the episode to be a reference to the incident, but "Homer at the Bat" was recorded a year before it happened.[10][11] Many of the guest stars, including Terry Cashman, Wade Boggs and Darryl Strawberry all admit that they are more well known because of their appearance in the episode, Cashman having "Talkin' Softball" requested more often than "Talkin' Baseball".[11]
One of the hardest pieces of editing was the hypnotist segment, which featured several of the guest stars speaking in unison. It was difficult because the parts were recorded over a period of several months and thus it was hard to sync their voices.[7] Rich Moore was originally intended to direct the episode, but as he did not know anything about baseball he was switched with Jim Reardon, who was a baseball fan. Moore was given the episode "Lisa the Greek" instead.[12] Many of the player designs were difficult, because the animators had a hard time designing real world people during the early years.[12]
