On the first day active rosters can be expanded the Mets as expected recalled AAA starters Mike Pelfrey and Phillip Humber, along with a lefty reliever, Willie Collazo.Pelfrey to wear No. 34 as usual, will try for his first victory of the year in a start this afternoon in Atlanta. Humber will wear the same No. 49 he wore last season in brief appearances.

Press notes say Collazo will debut in No. 36 — a jersey that earlier this year went to outfielder Chip Ambres. Ambres reportedly is among others who may still be recalled as the month rolls on.

The Mets in the meantime put together a solid game Friday in ending an ugly five-game losing streak. Among the casualties of the Philly sweep was Orlando Hernandez, who is expected to miss his next turn in the rotation resting a sore foot. The leading candidate to take his place is some guy called Martinez.