• Right-hander Hisashi Iwakuma played long toss in the outfield, throwing about 120 feet on Sunday morning, as he continues progressing back from a sprained tendon in his right middle finger that wiped out his entire spring. The plan is for Iwakuma to throw a bullpen session midweek after the team returns to Seattle as he continues building up his arm strength.
• D.J. Peterson, the Mariners' first-round pick in the 2013 Draft, went 4-for-4 with two doubles and three RBIs on Saturday night for Class A Advanced High Desert in a 9-3 win over Inland Empire. After an 0-for-4 opener, Peterson has gone 6-for-8 to put his average at .500. Outfielder Gabriel Guerrero is also off to a hot start, batting .545 (6-for-11) with a double and three RBIs.
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB as well as his Mariners Musings blog. This story was not subject to the approval of Major League Baseball or its clubs.