A's spring training observations: Batting leadoff ... Mark Canha? FacebookTwitterEmail MESA, Ariz. — With Marcus Semien gone, manager Bob Melvin named a few players who could bat leadoff for the A’s this season — including novel option Mark Canha. Elvis Andrus, who replaces Semien at shortstop, has experience with 181 career starts for Texas in the leadoff spot. Melvin said Thursday he has also spoken to Canha and center fielder Ramón Laureano about leading off and Tony Kemp is another possibility. “We do like to get guys at the top of the order who have the best chance to get on base,” said Melvin. “Even though (Canha) has some power, he can make a pitcher work, he gets on base — there are some variables that would suggest he might be a candidate for it.”