foot on ball is really your clue here.....had they lined up like they were going to try a FG and then all of a sudden switched into punt formation and punted the ball, then the receiving team fumbled it and Boss picked it up and ran it into the endzone for a TD THEN the OAK special teams should be credited....
Not necessarily. If the kick was blocked behind the line of scrimmage, then it isn't considered a Special Teams play. It's just a regular Offensive/Defensive play.
and to answer a couple of other things....receiving team is not in possession until they have control of the ball.....for instance a ball that bounces off a punt returners shoulder pads is not considered possession....it is a (muff)
You are correct that it is considered a "muff". However, it is
also considered a fumble for scoring purposes. For example,
here is a box score from 2009 in which Tennessee's returner muffed TWO punts. Notice that the box score credits him with 2 fumbles, while the defense is credited with 2 fumble recoveries? 99% of fantasy leagues credited them as "Fumble Recoveries", even though they were muffs.