That was O.J. Simpson of the Buffalo Bills who scored 16 rushing TDs and 7 receiving TDs in the 1975 season.
Marcus Allen
Through 4 games of the 2008 season, Tony Gonzalez has scored 68 regular season TDs and 2 playoff TDs.
In the NFL, Earl Campbell rushed for 9,407 career yards and scored 74 career TDs. He also caught 121 passes for 806 yards and 0 TDs.
0. Actually, no one has come close. Of those running backs who have scored 15+ touchdowns in a season, the most receiving TDs any one of them had in the same season was 8 by Marshall Faulk of the 2000 St. Louis Rams who had 18 rushing TDs. Next comes O.J. Simpson of the 1975 Buffalo Bills who had 16 rushing TDs and 7 receiving TDs.
Barry Sanders had 10 receiving TDs in his career. He also had 99 rushing TDs for 109 total career TDs scored.
11. Darrell Green scored 8 regular season TDs and 3 post season TDs in his career. In the regular season, he scored 6 TDs on interception returns and 2 TDs on fumble returns. In the post season, 1 TD was a punt return and 2 were interception returns.
Actually, there was no season where Jerry Rice scored 22 TDs. However, in the 1987 season, Rice scored 22 TDs from pass receptions and also scored 1 rushing TD for a total of 23.
Through the 2008 season, Larry Fitzgerald has scored 46 regular season TDs, all by receiving: 2004 - 8 TDs 2005 - 10 2006 - 6 2007 - 10 2008 - 12 He has also scored 7 TDs in the playoffs.
Adam Vinatieri with 1,158 total points
Brett Favre I think?
WR Stanley Morgan who scored 68 TDs (67 receiving, 1 rushing) for the Patriots between 1977-1989.