The Astros optioned righthander Jarred Cosart and three other top pitching prospects to the minor-league camp Wednesday morning. Righthanders Cosart, Ross Seaton, Jose Cisnero and lefthander Brett Oberholtzer were all sent back to the minors to continue their development. “It was a good experience,” said Cosart, who was acquired from the Phillies in the Hunter Pence deal in July 2011. “It was fun. I learned a lot. I’ll keep on going from here and hopefully get back here soon.” “For all of them it’s just continuing to improve their approach, gain more game experience against upper-level talent,” Astros assistant general manager David Stearns said. “These are still young guys, all [...]