Second baseman Jed Lowrie was placed on the 15-day disabled list Wednesday with a shin contusion, and the A's continued their pitching shuffle.
Lefty Eric Surkamp was officially recalled from Triple-A Nashville to make tonight's start at Boston, a plan that manager Bob Melvin announced after Tuesday's game. Right-hander Zach Neal also was promoted and lefty reliever Daniel Coulombe was optioned to Nashville.
To make room for Neal on the 40-man roster, Eric Sogard was transferred to the 60-day disabled list.
Lowrie fouled a ball off his shin Monday night. X-rays were negative but the infielder was in obvious pain. With Lowrie sidelined, the A's are without their co-RBI leader and are operating with a thin infield.
Third baseman Danny Valencia has been day to day with left hamstring tightness, so if he's not available, the A's would have to start first baseman Yonder Alonso at third again, as they did Tuesday, or go with Chris Coghlan or Tyler Ladendorf at third and play the other one at second.
Neal, 27, will make his major league debut with his first appearance. He is 4-1 with a 2.70 ERA in six starts with Nashville, and given that he's stretched out, he could be a long relief option Wednesday should Surkamp not pitch deep.