First box score I am checking is Gamblers @ Outlaws and when I scrolled, I thought the fumble section was tackles at first glance since the top guy had 6. My first instinct then was to check the weather and I see it rained in Tulsa on October 6, 1974. Must have been a monsoon, might have to check out some of that game after I finish POW stuff.
Your box score was at the bottom of the list, I look at the games from the schedule top to bottom, nothing personal.
I did notice Tucker fumbled 4 of those times but once he matures into his ratings he might not fumble 4 times a season. At least he wasn't the one with 6 fumbles.