He was the Packers' 1st-round pick in 1962. After two seasons as a backup (they had Jim Taylor ahead of him), Gros was included in the May 1964 Jim Ringo trade to the Eagles (for linebacker Lee Roy Caffey and a 1st-round pick, which became Donny Anderson).
Gros immediately took over the starting fullback role in Philly. He played all but 1 game from 1964-66, starting 12, 14, and 6 games in that span.
In March 1967 he was traded to the Steelers (with guard Bruce Van Dyke) for receiver Gary Ballman. He rode the bench for a year, then was their starting fullback in '68 and '69.
Earl finished up in 1970, playing 1 game for the Saints before they waived him in September.
These are Gros' 3 Eagles cards (1965-67). By 1967 he was with the Steelers.
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(Sitting next to his former Packers' teammate Jim Ringo - #54).