.share-print{margin-right: 130px !important;}Share this:EmailCommentsPrint0(function($) {$.getJSON('https://graph.facebook.com/?id=http://blog.chron.com/ultimateastros/2014/04/23/astros-employ-piggyback-system-to-preserve-pitchers-health/', function (data) { if (typeof data !== 'undefined' && data !== null && typeof data['shares'] !== 'undefined' && data['shares'] !== null) $('#facebook_share_count_1451248176').html(data['shares']); });})(jQuery); SEATTLE — Collin McHugh’s strikeout-happy start from Tuesday night is a prism for examining the Astros’ piggyback pitching system. The Astros are the first organization to use two starting pitchers per game at every level of the minor leagues.