Former Mets outfielder Lenny Dykstra deserves his fall from icon to inmate, his brother told the Daily News. Brian Dykstra said Monday that he figures his once high-flying, now bankrupt brother is at least partially guilty of the fraud and theft charges levied against him last week. "It's sad, but he's got to pay for what he did," the older brother, 49, told The News. "We feel sorry for him, but he's pretty much on his own right now. We're praying for him." Brian said Lenny's friend and former bookkeeper Dorothy Van Kalsbeek reached out to relatives in an email that detailed the arrest and his search for a lawyer. "I wish I could post bail. I know the real Lenny from years ago is still in there somewhere. But the family breakup was bad," Brian said. "We'll be there to help afterwards - when he gets out. I know he could go coach somewhere." He and younger brother Kevin have been estranged from Lenny since the former All Star player sold his car-wash business and allegedly reneged on money he owed them. The now broke ex-baller was arrested at his Encino, Calif., residence Thursday for allegedly buying cars with fraudulent paperwork, Los Angeles police said. In a separate case filed a day earlier, federal prosecutors accused him of embezzling $400,000 from his bankrupt estate, which includes an $18.5 million mansion purchased from hockey star Wayne Gretzky.