some of horse racing s greatest here s kathy park. reporter: at 20 years old, roughly 67 in human years, sun king may be done with racing but he still wants to win even if it s outrunning caretakers like 75-year-old michael blowen i run with a lot of them i m like 0 for 4,000 i ve never beat one of them once. reporter: this longtime film critic with the boston globe traded in a life covering hollywood headlines to chasing a different set of stars he s only got four teeth left so his carrots have to get cut up real tiny reporter: retired racehorses at this farm aptly called old friends. like celebrities. yeah. like meeting celebrities. that s exactly right reporter: horse fans still swoon over silver charm the 1997 kentucky derby and preakness winner was just three quarters of a length shy from a triple crown beat by touched gold touched gold wins it by half a length! reporter: the