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8/30/2014 11:35 P.M. ET

Collins manages 1,500th career game

NEW YORK -- Terry Collins wasn't sure he would ever reach this mark. But Collins blasted past a personal milestone on Saturday, managing his 1,500th career big league game.

Only eight other active managers have reached that plateau: Bruce Bochy of the Giants; Terry Francona of the Indians; Ron Gardenhire of the Twins; Clint Hurdle of the Pirates; Bob Melvin of the A's; Mike Scioscia of the Angels; Buck Showalter of the Orioles and Ned Yost of the Royals.

"It means I'm really, really lucky," Collins said. "That's exactly what it means: I've been very, very lucky. This has been a great experience, I've been in pennant races -- it's a lot of fun. I'm lucky to be able to do it as long as I've done it, and hopefully it can continue for a while."

Collins entered Saturday night with a 732-767 combined record at the helm of the Astros (1994-96), Angels (1997-99) and Mets (2011-present). He is 288-333 over nearly four full seasons in New York.

Last September, the Mets gave Collins a two-year contract extension with a team option for 2016.

Mets prospect Herrera collects first MLB hit

NEW YORK -- The ball sits atop Dilson Herrera's locker, dirtied and smacked around, just like dozens of others at Citi Field on Saturday. This one, though, is different. A slip of orange paper -- bound to the baseball by a rubber band -- designates its significance: Herrera's first Major League hit.

It was a single to left field, the result of an 0-1 fastball that Phillies starter Jerome Williams left out over the plate in the seventh inning and the highlight of a 1-for-3 game for Herrera, the Mets' No. 8 prospect. Philly shortstop Jimmy Rollins eventually tossed it into the Mets' dugout, and from there it made its way to the home clubhouse and Herrera's locker.

It was a bright spot of an otherwise forgettable night in Queens, a 7-2 loss for New York. For Herrera, 20, it was anything but.

Soon, the ball will be headed to Colombia -- home.

"It's for my parents," Herrera said.

deGrom making case to be NL Rookie of the Year

NEW YORK -- Jacob deGrom's National League Rookie of the Year Award bid appears to be back on track.

By firing seven innings of one-run (zero earned) ball against the Phillies on Friday night, deGrom increased his win-loss record to 7-6 while decreasing his ERA to 2.94. Reds outfielder Billy Hamilton has also been hot, batting .304 since Aug. 19, thereby narrowing this even further into a two-man race.

While the American League boasts several standout Rookie of the Year Award candidates, headlined by Chicago's Jose Abreu, the NL has fewer. Hamilton's 53 steals in 129 games may make him the favorite at this point, but deGrom appears close enough to challenge him with a strong September.

"He's unfazed," Mets manager Terry Collins said. "He just goes out and does the best he can."

A dark horse candidate for the honor is Mets reliever Jeurys Familia, who debuted in 2012 but retained his rookie eligibility into this season. Familia entered Saturday's play with a 1.90 ERA and four saves in 63 appearances. No rookie pitcher in either league has appeared in more games.

Worth noting

General manager Sandy Alderson said he does not anticipate a significant number of callups when rosters expand on Sept. 1. Instead, the Mets are likely to recall only a catcher and a reliever, keeping many of their top farmhands at Las Vegas to fight for the Triple-A championship. The Mets will promote more players in mid-September.

Anthony DiComo is a reporter for MLB.com. Follow him on Twitter @AnthonyDicomo. Tim Healey is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.