As Cubs aim to upgrade pitching at trade deadline, high-scoring hitters show what’s possible in playoffs

ST. LOUIS – When Jed Hoyer’s front office wraps its work at the trade deadline Monday, don’t expect to see any big additions to the lineup. Obviously, the team’s focus will be on improving a pitching staff that’s already had its depth stretched to its limits amid an avalanche of summer injuries. But adding arms doesn’t just demand a higher priority. The team’s position players have been good enough that significant midseason augmentation in that area is simply not necessary. “Our…