Wanted to do research Re:RL on favorites.
Under SportsDatabase, there have been 14249 favorites since 2004. Sorting by margin, there have been 2212 games where the favorite won by 1 run. That's 15.52%.
Now, look at the run lines on the board:
HOU -130 -> +161
MIL -131 -> +166
WAS -103 -> +193
BOS -220 -> -110
KC -108 -> +185
ARI -132 -> +157
COL -175 -> +120
LOS -169 -> +127
Our average lay changes from -146 to +149. The -146 is calculated by SportsDatabase, simply typing in the value of F and getting the average odds for favorites over the past 5 years.
The +149 is calculated by taking the average of all the differences on the board (295) and adding that to the -146. The long term the number may be different, this is a very small sample.
Now, say we break-even on favorites, hitting at a 146-100 record. Lets now take into account what would happen playing the run line:
246 total games X .1552 (1 run win %) = 38 winners changed to losses.
New record: 108-138. 108*149 + 138*-100 = +$2292
Math may be wrong since I don't have an exact value for RL.