Cubs place Nico Hoerner, Jake Arrieta and Dan Winkler on the 10-day injured list
‘‘We’re optimistic about everyone,’’ manager David Ross said before the opener of a doubleheader against the Dodgers. ‘‘I don’t think they’re very serious [injuries].’’ Hoerner’s IL stint comes after his collision with outfielder Ian Happ in the Cubs’ loss Sunday to the Reds. Hoerner said before the doubleheader that he had some soreness after the game Sunday, but nothing too severe. It was a bit worse Monday, however, leading to the Cubs’ decision to put him on the IL. ‘‘I was pretty stressed in the outfield, just not knowing what condition [Happ] was in,...