When San Francisco's Tarvarius Moore intercepted a deflected Patrick 
Mahomes pass with 11:57 remaining in the fourth quarter, this game 
should have been over. The 49ers had the ball, a 10-point lead and a 
running game that looked unstoppable. 
To that point, 49ers 
running backs Raheem Mostert and Tevin Coleman, as well as wide receiver
 Deebo Samuel, had averaged 6.9 yards per rushing attempt. Both Mostert 
and Coleman had already put together monster playoff performances this 
year, and San Francisco had the NFC's No. 1 running game during the 
regular season. 
And yet, the 49ers ran the ball just four times the remainder of the night. 
When Mostert
 gained just one yard on a first-down play with about 10 minutes 
remaining, Shanahan appeared to panic. Quarterback Jimmy Garoppolo (who 
did seemingly audible at the line of scrimmage) threw a wildly 
inaccurate incomplete play-action pass on second down, which led to a 
penalty, a short scramble and a punt. 
Kansas City then drove down
 the field to cut the lead to three. And after Mostert ran for a solid 
five yards on the first play of San Francisco's next series, Garoppolo 
again threw an incomplete play-action pass, this time out of the 
shotgun. He threw incomplete under pressure on an obvious passing down 
after that, and the 49ers had to punt after taking just 48 seconds off 
the clock. 
Just 154 seconds later, the lead was gone and the script was flipped. 
Shanahan has to at least be considered the worst clock-bleeder in Super Bowl history. 
Sure,
 the Chiefs keyed on the run. But the box was by no means stacked on 
that second-down throw just inside the 10-minute mark, and the throw on 
3rd-and-5 on the three-and-out came against a six-man box. 
Plus, 
San Francisco's only two runs in the final 10 minutes gained 22 yards, 
so it's not as though the running game was no longer effective when 
called upon. 
Shanahan coached scared with the lead, and he panicked again when he lost it. 
Mostert
 gained 17 yards on the first play from scrimmage after the 49ers had 
fallen behind 24-20, but that was the breakout star's final touch of the
 game. They took a false start penalty on an attempted run right after 
that, but they threw on 1st-and-15 when the two-minute warning hit. They
 ignored a wide-open box and threw again on first down at the Kansas 
City 49-yard line. They threw from the shotgun against a six-man box on 
second down, and beyond that the hole was too deep.