ARLINGTON — Lucas Harrell is the joking, silly, fun, crass, over-the-top clubhouse prankster who was a spring training favorite in Kissimmee, Fla. He’s also a 28-year-old righthander with a 5-9 record and 5.04 ERA. Harrell was blasted for five hits, nine runs (seven earned) and six walks in just 3 2/3 innings Friday during the Astros’ 10-5 near-blowout loss to the Rangers. And while his teammates showered, dressed and quietly spoke postgame, Harrell sat in the middle of the locker room on a black leather couch, playing a kids’ video game on a tablet, ignoring everything and everyone around him. More than five minutes passed before Harrell moved. Then he [.]