Seattle puts one of their most reliable relievers on the shelf. Another blow for the Seattle Mariners bullpen came today, as the M’s placed RHP Erik Swanson on the 15-day injured list with elbow inflammation. The team recalled LHP Danny Young, who had just been optioned to Triple-A Tacoma yesterday. The injury is a brutal one for Swanson, who was enjoying a brilliant start to the season, with a 1.29 ERA and 2.21 FIP through 14.0 IP, striking out 39.6% of hitters he’d faced with just 1.9% earning free passes. With injuries sidelining RHP Casey Sadler for the entire season…