One thing to watch on all 30 MLB teams as spring training begins

Who are the teams to watch in spring training? (1:07)

David Schoenfield explains why the Yankees and Cubs are the teams he has his eyes on during spring training. (1:07)

The long trek to the start of the regular season begins this week with training camps opening up on time in Florida and Arizona -- although with many of the same COVID-19 protocols in place as during the 2020 season.

For now, Opening Day on April 1 is on schedule -- the defending champion Los Angeles Dodgers start up at the Colorado Rockies -- and the 108-page operations manual for 2021 includes shorter spring training games, mandatory wearing of contact-tracing devices, fines for not wearing masks properly and bans on indoor dining and going to movie theaters.

Fans will be allowed to attend spring training games in limited numbers; Florida teams will limit cross-state travel for games; and players will face a five-day quarantine when first reporting to camp. Otherwise, it's all systems normal -- as normal as they can be, anyway.

As players head to spring training, let's take a run around the majors to see the biggest spring training story to watch for each team and some key players to keep an eye on.