Tucker, who has signed with the University of Florida, is a taller, more athletic version of his brother, but both are left-handed hitters.
The Draft continues on Tuesday with Rounds 3-10. The MLB.com preview show begins at 11:30 a.m. CT, with exclusive coverage of Rounds 3-10 beginning at noon.
Preston Tucker was drafted in the seventh round of the 2012 Draft out of Florida after setting school records in hits, at-bats, doubles and RBIs. He led all Astros Minor Leaguers last year with 24 home runs between Double-A and Triple-A.