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 as well as holding out RHPs Matt Festa, Ken Giles, and Joey Gerber indefinitely, as well as the just-healthy Sergio Romo, Swanson’s role as a stopper has been invaluable for Seattle.