The Manager History menu option (Manager Menu >> History >> Manager History) contains a year-by-year summary of your human manager's career.

Your History also includes some basic statistics about how your teams performed during the listed seasons, and also includes the Manager Score for the season. Records that are below a .450 winning percentage or above a .550 winning percentage are displayed in different text colors. Records in between those two are displayed in white text. (Looks like I need to work on my managerial skills...)