Arizona Diamondbacks starting pitcher Caleb Smith struggled on Tuesday afternoon, allowing six runs over two innings in a 7-2 loss to the Padres. Most of the damage occurred in a five-run second inning as he finished the day allowing six earned runs on four hits and two walks with one strikeout. Smith had a poor showing last season that was disguised by a certain amount of luck, as he posted a career-worst 20 percent walk rate while his 100 percent left-on-base rate and his 5.29 xERA suggest he...