Steve Garvey, the celebrity candidate angling to fill the late Sen. Diane Feinstein’s seat, is deep in the whole with state and federal taxes. Garvey, a Los Angeles Dodger and San Diego Padres great, owes at least $350,000 and as much as $750,000 in back taxes dating over a decade ago, according to his February financial disclosure statement listing two estimated six-figure amounts and first reported by The Sacramento Bee. Citizens for Responsibility and Ethics’ research director Robert Maguire suggested that the substantial tax liability for a senate hopeful is rare. ALSO READ: Trump is explo…