The Astros fourth-round pick — first baseman Conrad Gregor of Vanderbilt — said today via twitter that he has signed with the team. Proud to be a member of the #Astros organization! Excited to officially get my pro career started on Monday!Thanks for all the support! — Conrad Gregor (@conradgregor55) June 13, 2013 _ Earlier, the Astros announced eight more signings from this year’s draft: CF Jason Martin (8th round), SS Thomas Lindauer (23rd round), LHP Albert Minnis (25th round), RHP William Chrismon (26th round), RHP Pat Christensen (27th round), LHP Randall Fant (29th round), RHP Zachary Morton (32nd round) and RHP Tyler Brunnemann (40th round). The team still hasn’t [...]