Texans general manager Rick Smith and his son Robert Lamar, 10, were guests of Astros manager Bo Porter during batting practice Saturday night at Minute Maid Park. “I’ve become such a fan of Bo Porter and the way that he leads and am just very impressed,” Smith said. “And to have an opportunity to bring my son out and have him learn a little bit from these guys has been special.” Both men faced each other as Big Ten rivals when Smith was finishing his career_ at Purdue and Porter was an underclassmen cornerback at Iowa more than two decades ago. “It’s one of those things where it was a [.]