Smoldering MLB train wreck Lenny Dykstra just pled guilty to three federal crimes -- and now faces an additional 20 years in prison ... on top of what he's ALREADY serving for grand theft auto.
Dykstra pled guilty today in federal court to three counts stemming from his bankruptcy fraud case in L.A. -- one count of bankruptcy fraud, one count of concealment of assets, and one count of money laundering.
Dykstra had been accused of filing for bankruptcy, then illegally hiding and selling up to $400,000 worth of possessions inside his mansion ... including valuable sports memorabilia, chandeliers, and even an oven.
His sentencing is scheduled for December 3.
Dykstra is currently serving a 3-year sentence in federal prison for grand theft auto and falsifying financial statements -- a sentence he began in March.
And if that wasn't bad enough -- Dykstra also has a 9-month jail sentence hanging over his head for exposing himself to women he met on Craigslist.