LOS ANGELES, Calif. -

The expected lifespan of the San Francisco Giants fan severely beaten in Los Angeles has become an issue in the trial of a lawsuit against the Dodgers.

Doctors retained by Bryan Stow's attorneys have previously asserted during court proceedings that Stow's life expectancy has dropped two to five years.

The Los Angeles Times reports that estimate was challenged Monday by Robert Shavelle, technical director of the Life Expectancy Project. He said Stow, now 45, would probably live about 23 more years - 10 years less than average.

An attorney for Stow and his family cast doubt on Shavelle's methodology, saying it did not account for how active a lifestyle he lived.

Life expectancy is an issue if the jury decides to award monetary damages for Stow's lifetime care.

Stow was a paramedic in the Santa Cruz area when he was severely beaten outside Dodger Stadium in March 2011 during the season's opener against the Giants. Two Dodgers' fans, Louie Sanchez and Marvin Norwood, pleaded guilty to assault charges earlier this year.