[Merkle923]

The celebration is of the 1955 team's then-record tying feat of winning its first nine games. They'd break the mark to go 10-0 before losing. Can't tell the half a Dodger upper right for sure but the youth, shape of the chin, and the circumstances suggests Clem Labine - he saved the ninth win just before the shot was taken.

Also, the incomplete figure may be holding something in his left hand but it's not a phone, unless it's a toy. A 1955 phone would have to be attached to something.