There are a few different things that go into setting a sports betting line. For one people are attached to the stats pages to try and mathematically put a worth on a certain team or player. Another aspect is the variables including injury reports and trade rumors.
Bookies and sports book reviews tend to spend a lot of time over stats, including the team’s current streaks, home field advantage and injury reports. All of these things are crucial into setting a betting line. Even something as miniscule as a single player having a bad day can sometimes affect betting lines with really hard core bookies.
Sports betting lines are set sometimes up to a week in advance to represent the odds on any given day and they are subject to change. Different betting sites use different stats in order to make up their odds.