Regarding MSU "touchdown" -- Rule 4-2-4-e

THE DEFINITION OF THE GOAL LINE:

"Goal Lines
ARTICLE 2. The goal line at each end of the field of play runs between the
sidelines and is part of the vertical plane that separates the end zone from
the field of play. This plane extends beyond the sidelines (Exception: Rule
4-2-4-e). The two goal lines are 100 yards apart. The entire goal line is in the
end zone. A team’s goal line is that which it is defending (A.R. 2-11-2-I)"


RULE 4-2-4-e

"Out of Bounds at Forward Point
ARTICLE 4. a. If a live ball is declared out of bounds and the ball does not
cross a boundary line, it is out of bounds at the ball’s most forward point
when it was declared dead (A.R. 4-2-4-I) (Exception: Rule 8-5-1-a, A.R.
8-5-1-I).
b. A touchdown may be scored if the ball is inbounds and has broken the
plane of the goal line before or simultaneous to the ball carrier going out
of bounds.
c. A receiver who is in the opponent’s end zone and contacting the ground
is credited with a completion if he reaches over the sideline or end line
and catches a legal pass.
d. The most forward point of the ball when declared out of bounds between
the end lines is the point of forward progress (A.R. 8-2-1-II and A.R.
8-5-1-X).
e. When a ball carrier dives or jumps toward the sideline and is airborne as
he crosses the sideline, forward progress is determined by the position
of the ball as it crosses the sideline (A.R. 8-2-1-III and IV)"

So based on the definition of "goal line" and Rule 4-2-4-e, the MSU player did not score because the ball went out of bounds before it crossed the goal line.