LOS ANGELES >> When Dave Roberts sized up the Dodgers' eighth-inning committee Sunday, he did not mention the one pitcher the team signed in the off-season to cover the eighth inning.His role reduced to an afterthought, Sergio Romo threw four pitches for the Dodgers in July. Thursday, he was designated for assignment to make room for left-handed reliever Grant Dayton, who was activated from the 10-day disabled list.