It was idiocy putting Scott in a high leverage situation like that in his first game of the year in the bigs when the 8th inning guy was available to start the inning. He got cute, hopping not to have to use Kelly, and he got burned twice. He lost the game and he burned Kelly anyway.
Edit: It will be obvious that it was a mistake, because Core will not use Scott or any other bullpen pig in a 1 run game in the 8th inning when the high leverage guys are available.