INDIANAPOLIS — According to the superstition, a broken mirror will lead to seven years of bad luck. For the Andretti family, two broken mirrors on one day at Indianapolis Motor Speedway apparently is a continuation of 37 years of bad luck. Since Mario Andretti won the 1969 Indy 500, bad luck has followed the Andretti family at the famed 2.5-mile track. The terms ‘Andretti Luck’ or ‘Andretti Curse’ are a part of folklore at the track. An old joke is that former track announcer Tom Carnegie’s four most famous words aren’t “Gentlemen, start your engines” but are instead “Andretti is slowing down.” True, Michael Andretti has found success as a car owner at Indy. Dan Wheldon won for Andretti in 2005, and Dario Franchitti won for Andretti Green Racing on Sunday. But as drivers, Andrettis have had awful luck at Indy. One infamous example is the 1992 Indy 500, when Michael Andretti led 160 laps and was cruising to victory when his car died on lap 189. And then there was 2006, when 19-year-old son Marco Andretti’s block on Sam Hornish Jr. on lap 199 seemingly sealed the deal. Off the final turn, however, as third place Michael Andretti pumped his fist in anticipation of his son’s win, Hornish blew past the younger Andretti for the win. Sunday’s race featured father and son Andretti once again, as well as cousin John Andretti, making his first Indy 500 start since 1994. Early in Sunday’s race, there was a caution for debris. John Andretti’s mirror had come off, and was sitting in turn 3. At the end of Sunday’s race, Marco Andretti drifted high and clipped Dan Wheldon. “My mirror was broke, so I had no idea who was outside of me,” Marco Andretti said. “I apologize.” What are the odds of two members of one family suffering the same unusual problem in the same race? And then there was Michael Andretti, who came out of retirement for a 15th shot at winning Indy last year and announced his re-retirement Monday. “I was disappointed with today,” Michael said after Sunday’s 13th place run. “I really thought there was going to be a lot more out of today. It was just a day that nothing worked. I think we had an okay car. It’s just I got mixed up in the back, and I could never get it to the front. Every time we tried a different strategy, something else would go wrong. It was just one of those days. “It’s like it’s just the way it happened,” he added. “Obviously it wasn’t meant to be, to win it as a driver.” If there is any consolation for the Andretti family, Dale Earnhardt lost the Daytona 500 nearly every way imaginable before winning it in his 20th attempt in 1998. What happened in his 19th attempt? Earnhardt flipped on the backstretch.