The memorial for Adenhart will be held Friday at Williamsport High school in Williamsport, Md, where he played high school baseball before being drafted by the Angels in 2004.
The Osborne Funeral Home told the Associated Press the 7p.m. ceremony will be closed to the media at the family's request.
The 22-year-old Adenhart died Thursday in a hit-and-run accident in Fullerton that also claimed the lives of two of Adenhart's friends, 20-year-old Courtney Stewart and 25-year-old Henry Pearson.
Adenhart had pitched six scoreless innings for the Angels only hours earlier. He died at UC Irvine Medical Center.
A memorial service will be held for Pearson in Manhattan Beach Thursday. Beginning at 4p.m., Pearson will be remembered at his alma mater, Mira Costa High School with a ceremony that includes a first pitch, the national anthem, nine innings of poems and stories, and a group singing, "Take Me Out to the Ball Game."
Pearson was a passenger in the car driver by Stewart.
The lone survivor of the crash is Jon Wilhite, 24 a graduate of Mira Costa High School and Cal State Fullerton.
The four friends were driving to a Fullerton dance club when the car Stewart was driving was broadsided by a suspected drunken driver.
Andrew Gallo, 22, of San Gabriel, has been charged with second-degree murder and remains jailed in lieu of $2 million dollars in bail.
He's accused of driving with a blood alcohol level nearly three times the legal limit, driving with a suspended license and running a red light and crashing into the car driven by Stewart.
Wilhite remains hospitalized at UC Irvine Medical Center, where his condition has been upgraded from critical to serious.
Donations to the Benefit Fund for Jon Wilhite can be made to account 3980643658, at any Wells Fargo Bank branch.
The official site of the Los Angeles Angels of Anaheim , The Associate Press and CNS contributed to this report.
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