Testimony resumed Monday in the wrongful death civil trial of Grossman Burn Foundation co-founder Rebecca Grossman and former MLB pitcher Scott Erickson in a fatal 2020 crash in Westlake Village that killed two young brothers with law enforcement officers taking the stand. Last week’s testimony wrapped up with former MLB player Royce Clayton, who played for about a dozen teams between 1991 and 2007, on the stand Friday. Clayton testified at the …