The Phillies and New York Mets will be there, according to MLB Network's Jon Heyman.
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MLB Network's Joel Sherman reports the New York Yankees will also be in attendance.
The 37-year-old hopes to recapture that magic he had in Philly.
Hamels was an integral part of the Phillies' 2008 World Series Championship. He also was the World Series MVP.
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But Hamels started just one game for the Atlanta Braves last season.
He went 3 innings, giving up three runs on three hits with two strikeouts and one walk in a loss to the Baltimore Orioles.
In 2019, Hamels went 7-7 with a 3.81 ERA in 27 starts for the Chicago Cubs.
The four-time All-Star has also pitched for the Texas Rangers.
He has a career record of 163-122.
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The Associated Press contributed to this report.
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