G.W. Stowik wrote the original. MLB is a large sportsbook handle — roughly 2,400 games, April to October — which is why a sloppy unit size dies of attrition instead of one Sunday.
Moneyline. A favorite at −150 means $150 to win $100. A dog at +130 means $100 wins $130. Scale the zeros for a $10 player. Do not bet only favorites. Track the starter and the platoon.
Run line. Typically −1.5 / +1.5; blowouts sometimes 2.5. A Sox side at −130 on the moneyline might be −1.5 around +190. That is a different bet, not “the same game cheaper.”
Totals. 8.5 is a common number (range often 7–10). Park plus pitching. Vig usually −110, sometimes −120 to even. Form, H2H, home/away, hitting vs RHP/LHP, and the last ten games are the homework, not a vibe.
Wager on baseball when you have a number. Related notes.
General information, not advice. Gambling involves risk. See the disclaimer.