I watched Caddy do better in short yardage and GL situations and the Bucs then stopped using Alsuck in those situations all together.
To clarify, Caddy had only 2 carries from inside the 5, and scored one TDHe had 13 carries on 3rd/4th and short and averaged 7.7 yards per rush. his 2nd and short numbers were not as good, but he had 20 carries in those situations.
Alstott OTOH, had 9 GL carries and 6 TDs - significantly fewer carries than Caddy on short yardage situations off the GL - to support the above assertion, he had almost no carries from week 13 forward, and scored no rushing TDs.