The Astros and supplemental first-round pick Lance McCullers Jr. have agreed on a $2.5 million bonus, pending a physical on Monday.

The assigned value for McCullers' No. 41 selection was $1,258,700. McCullers exceeded that amount by $1,241,300, eclipsing Cardinals second-rounder Carson Kelly for the highest bonus over pick value thus far in this year's draft. McCullers was considered a mid-first-round talent but dropped amid signability concerns.

The son of former big league pitcher Lance McCullers Sr., Lance Jr. has one of the most electric arms in the 2012 draft. Both his 94-96 mph fastball and his mid-80s slider grade as plus-plus pitches at times, and he has reached triple digits on the radar gun. He had committed to Florida, where he would have been a two-way player.

Because the Astros inked No. 1 overall choice Carlos Correa for $4.8 million (versus a $7.2 million pick value), they still remain $1,296,400 under their bonus cap for their signings so far. That should allow them to make a run at third baseman Rio Ruiz (fourth round) and lefthander Hunter Virant (11th), high schoolers who could command seven-figure bonuses.

View our Astros Draft Database here.