In a season that must ultimately be judged by how the Astros grow and weed out the pretenders, righthander Jordan Lyles is one of the biggest reasons for hope at Minute Maid Park. At 22, the big righthander from South Carolina might already be the Astros’ ace. He’s that good. Coming off a career-high 10 strikeouts against the Mariners, he is 2-0 with a 1.67 ERA in his last six starts. In that span, he has given up only seven earned runs over 37 2/3 innings while striking out 28 and walking just 10. The Astros haven’t had a young pitcher as good as Lyles at Minute Maid Park since [...]