The Tampa Bay Times reported on its website that McCullers was flying to Houston on Sunday and would take a physical on Monday morning. Astros general manager Jeff Luhnow wouldn't confirm the report, but he said last week he hoped to sign McCullers soon.
McCullers, who has a scholarship offer from Florida, went 13-0 with a 0.18 ERA with 140 strikeouts in 77 1/3 innings during his senior season at Jesuit High School in Tampa, Fla. He's the son of former Major League pitcher Lance McCullers.
The Astros signed No. 1 overall pick Carlos Correa last week for a signing bonus of $4.8 million, below Major League Baseball's prescribed $7.2 million bonus value. McCullers' bonus value is $1.258, but the Astros will likely use the money they saved on Correa to sign McCullers, who's considered a first-round talent.