The World Series ended Wednesday night, but the Cubs already are in the midst of planning for the 2018 season. They’ve planned for the possibility of departures, as eight players were expected to file for free agency Thursday morning. Pitchers Jake Arrieta and Wade Davis lead the list of Cubs players expected to file, although President Theo Epstein said Oct. 20 that he has interest in re-signing both. Arrieta, 31, the 2015 National League Cy Young Award winner who has averaged 18 victories in the last three seasons, will be one of the top free-agent pitchers on the market. Davis, 32, converted 32 of 33 save opportunities last season in addition to posting a 2.30 ERA in 59 games. The Cubs have an exclusive five-day window to negotiate with their current free agents.