Back Friday from the Winter Meetings, the Mariners took care of some housekeeping matters on two left-handed pitchers.
The Mariners designated Kiekhefer, 27 for assignment on Dec. 3 to clear space on their 40-man roster after signing two free-agent relievers, lefty Marc Rzepczynski and Casey Fein.
Kiekhefer joined the Mariners through a Nov. 4 waiver claim from St. Louis, where he made his major-league debut last season by compiling a 5.32 ERA in 26 appearances. He limited left-handed batter to a .209 average.
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He fared better at Triple-A Memphis, where he was 6-1 with a 2.08 ERA in 29 games. Kiekhefer is 20-16 with a 2.67 ERA in 265 minor-league games over seven seasons.
Pike, 22, was a third-round pick in 2012 but seemed to plateau in spending much of the last three seasons Hi-A. He was 6-5 with 4.01 ERA last season in 25 starts at Bakersfield.
Sending Pike to the Braves completes a deal in which the Mariners acquired right-handers Rob Whalen and Max Povse for outfielder Alex Jackson and a player to be named later.
Bob Dutton: @TNT_Mariners