Ortiz is handling first base and batting his customary third in the order Tuesday at St. Louis, Pete Abraham of the Boston Globe reports. Ortiz will supplant regular starting first baseman Mike Napoli during the opener of a three-game series in a National League park. Despite getting off to a slow start in the second half -- .232/.262/.607 in 56 at-bats -- he's belted a home run every 9.33 at-bats (for six in all).