I closely won a playoff game last week because the guy tried to chase my lead in Ks because he was too afraid I'd spot start him to death. He started off with great Ws by Colon and Sabathia while my Schmidt blew up. After my spot starts of Robertson and Tomko got me a healthy K lead, he pulled in a Santos start, and I made up so much ground in the ratios that I swept pitching and won the game. If you have a good staff, don't spot start. If, like me, you've only got 4 decent starters, then pulling in someone vs. ARI or KC is your only strategy at this point.