Interference or no??

[TussAgee11]

Wonder if this was in the rules in 1975?

Rule 7.09(i) Comment: When a catcher and batter-runner going to first base have contact when the catcher is fielding the ball, there is generally no violation and nothing should be called. “Obstruction” by a fielder attempting to field a ball should be called only in very flagrant and violent cases because the rules give him the right of way, but of course such “right of way” is not a license to, for example, intentionally trip a runner even though fielding the ball. If the catcher is fielding the ball and the first baseman or pitcher obstructs a runner going to first base “obstruction” shall be called and the base runner awarded first base.