SECAUCUS, N.J. — The Philadelphia Phillies have lots of options — and uncertainty — at the top of the Major League Baseball draft.

They could go with a smooth-hitting high school outfielder with the No. 1 overall pick Thursday night. Or, a slugging college outfielder. Maybe a big college left-hander. A hard-throwing high school lefty might be the choice.

Less than 24 hours before Commissioner Rob Manfred was set to declare that the Phillies were officially on the clock to lead off the draft, there still was no clear indication of who Philadelphia would take.

“There’s a lot of debate going on up there,” Phillies general manager Matt Klentak said earlier this week. “And it’s good debate. It’s really healthy.”

The choice might be California prep star Mickey Moniak, who could become the first high school outfielder selected No. 1 since Tampa Bay drafted Delmon Young in 2003. The left-handed hitter has solid power to the gaps and is also an outstanding defensive player.

Mercer outfielder Kyle Lewis, a two-time Southern Conference player of year who hit .395 with 20 HRs and 72 RBIs, could be the pick. Louisville’s Corey Ray has been the offensive leader (.319, 15 HRs, 60 RBIs, 44 for 52 in stolen bases) for the Cardinals, who are in the NCAA Tournament’s super regionals.

Florida left-hander A.J. Puk, a 6-foot-7, 230-pound fireballer, has only two wins for the Gators, but has the stuff that could make him a future ace. He could become the sixth lefty to be selected No. 1 overall, but the second in three years — joining Brady Aiken (Houston, 2014).