The phrase "to begin the season" refers to the start of a specific period, typically related to a sport or activity that has a defined time frame. Full definition
It remains to be seen, however, whether he will begin the season as automatic first - choice. (sbnation.com)
But they all were a part of the team last year, had some modest success, and the team decided that they should begin the season on the roster. (sbnation.com)
The Magic have lost nine straight games since beginning the season with eight wins in their first 12 contests. (si.com)