Line Shopping
Line shopping; placing each bet at the sportsbook offering the best available price; is the single largest measurable edge for recreational bettors. It costs nothing, requires no model, and adds an estimated 2-5% to long-term ROI.
Why It Works
Different sportsbooks set lines slightly differently based on their customer base, risk appetite, and starting price. On any given Patriots spread, DraftKings might offer -3.5 (-110), while FanDuel posts -3 (-115). Those are meaningfully different bets. Over hundreds of wagers, taking the best line on each adds up to a measurable edge.
How Many Accounts to Maintain
For Massachusetts bettors, the optimal account portfolio is DraftKings + FanDuel + BetMGM + Caesars at minimum. That covers the four largest operators and captures most line variation. Adding Fanatics, theScore Bet, and Bally Bet gives you the full seven-book picture for marginal additional shopping benefit.
What to Shop
Shop everything: moneylines, spreads, totals, alternate lines, player props, parlays. Player prop pricing varies the most across books; a Tatum points prop can vary by 1-1.5 points at the same odds. Always check at least three books before placing a prop. Shop totals before placing; a half-point on a total impacts win rate more than most bettors realize.
CLV: The Real Scorecard
Closing line value (CLV) measures whether you got a better number than the closing line at the same book. Beating CLV consistently is the best long-term indicator of profitable betting. Bet at -110 on a line that closes at -120? You got CLV. A bettor who consistently beats closing lines will be profitable over a large enough sample.
Key Takeaways
- Maintain 3-4 active MA sportsbook accounts at minimum
- Always check the price at every book before placing a bet; yes, every single one
- Player props vary most across books; biggest line-shopping edge lives there
- Track your CLV; it's the best leading indicator of long-term profitability