Reading across, #HD is the total of home day games, 1998-2000, followed by the team’s winning percentage in those games, the overall home winning %, the win% in away day games, and the win% in all away games.

Of the teams playing fewer than 60 HD, every one had a lower win% in those games than in all home games. And those win% are noticeably poorer, overall, than those of the teams playing many home day contests. It appears that a team that plays few home day games loses some of whatever home field advantage it has in those. Four of the five teams playing few home day games were actually better in away day games, suggesting that for many of the ordinary teams home day games may also be a slight disadvantage - in that the home advantage might be smaller.

The teams playing many home day contests maintained the home advantage for the most part, and the Mets were quite a bit better in those. Toronto was singular in that the Jays, playing many home day and playing well in those, were even better in away day!

Over the years our studies of day games included seeing if slugging teams did better in daytime (inconclusive) and judging that fastball or hard-throwing pitchers were more apt to have a higher ERA in day games, which turned out to be true but with exceptions.

Generally, ERA are lower in night games, but obviously not always. American League starters have been better, slightly, in daytime in recent years, with NL starters holding to the historical pattern of lower ERA in night games. AL day games have averaged 10.2 runs, as opposed to 10.4 runs at night. National league contests total 9.9 runs in daytime, 9.6 runs at night. These are over the 1998-2000 period.

Against the Over/Under line, AL day games are over 47.8% of the time, while NL day games are over 49.8%, an almost even split. So day games have produced more unders. Ties v. the line not included. Night games have been over 48.4% of the time in the AL, and have gone over 50.7% in the NL in the 1998-2000 span.