Leave it to the Astros to land in a situation that can drown out the joy of an All-Star game.

The Astros’ protracted negotiations with their first overall draft pick Brady Aiken on Tuesday drew a stern admonishment from the head of the major league baseball players union, who accused the club of manipulating the draft slotting and medical evaluation rules to its advantage.

The Astros have until 4 p.m. on Friday to sign their five remaining unsigned 2014 draft picks, including three highly touted prep pitchers: Aiken, the first overall pick; fifth-rounder Jacob Nix and 21st rounder Mac Marshall.