Sept 9 (Reuters) - Five storylines to track during the 2020 National Football League (NFL) season, which kicks off on Thursday.

NFL owners approved a proposal on Tuesday to expand the playoff field from 14 teams to 16 if clubs are unable to complete the same number of regular-season games due to the ongoing COVID-19 pandemic.

As Week 4 concludes, let's look at the NFC West standings, what happened in Week 4 and what is coming up in the division in ...