Bo Jackson coaches home run hitters — PHOTOS

Former football and baseball player Bo Jackson swings at the ball during the FanDuel home run derby at the Big League Dreams park in Las Vegas on Friday, Aug. 21, 2015. Ninety finalists, including Spears, competed in the inaugural derby and will compete for a grand prize of $1 million in the World Fantasy Baseball Championship on Saturday. David Becker/Las Vegas Review-Journal

Former football and baseball player Bo Jackson, left, gives Cal Spears of Tenn., a few pointers before Spears participates in the FanDuel home run derby at the Big League Dreams park in Las Vegas on Friday, Aug. 21, 2015. Ninety finalists, including Spears, competed in the inaugural derby and will compete for a grand prize of $1 million in the World Fantasy Baseball Championship on Saturday. David Becker/Las Vegas Review-Journal

Former football and baseball player Bo Jackson looks on during the FanDuel home run derby at the Big League Dreams park in Las Vegas on Friday, Aug. 21, 2015. Ninety finalists, including Spears, competed in the inaugural derby and will compete for a grand prize of $1 million in the World Fantasy Baseball Championship on Saturday. David Becker/Las Vegas Review-Journal

Former football and baseball player Bo Jackson, left, speaks with the event emcee Kay Adams at the FanDuel home run derby at the Big League Dreams park in Las Vegas on Friday, Aug. 21, 2015. Ninety finalists, including Spears, competed in the inaugural derby and will compete for a grand prize of $1 million in the World Fantasy Baseball Championship on Saturday. David Becker/Las Vegas Review-Journal

Former football and baseball player Bo Jackson smiles after hitting a few balls at the FanDuel home run derby at the Big League Dreams park in Las Vegas on Friday, Aug. 21, 2015. Ninety finalists, including Spears, competed in the inaugural derby and will compete for a grand prize of $1 million in the World Fantasy Baseball Championship on Saturday. David Becker/Las Vegas Review-Journal

Former football and baseball player Bo Jackson watches the action at the FanDuel home run derby at the Big League Dreams park in Las Vegas on Friday, Aug. 21, 2015. Ninety finalists, including Spears, competed in the inaugural derby and will compete for a grand prize of $1 million in the World Fantasy Baseball Championship on Saturday. David Becker/Las Vegas Review-Journal