'It's a Lock': The 5 Most Expensive Phrases in Sports Betting

Some betting phrases have a strange way of sounding like facts. A forward with six goals in five is “in form.” The team at the bottom “has to win.” Fair enough. Both might be true. None of that automatically makes the bet good. The same logic can turn against you just as easily, and the odds may already have accounted for the obvious part anyway. 

Still, once one of those phrases gets into your head, it can be surprisingly hard to see past it. Which got me thinking: what are the most expensive words in sports betting — and why do we keep falling for them?

1. "They Have to Win"

I hear this phrase thrown around all season, and for different reasons. Two more poor results after Manchester United’s opening-day defeat to Hull, and suddenly Michael Carrick could be heading into one of those games where anything short of three points feels like another turn of the screw. Tottenham could soon find themselves in much the same boat after the disappointment of 2025/26. But it could also be much more literal, like when a team is three points from safety with four games left, or heading into the last match of a group stage knowing anything short of a win sends them home.

You can see where the thinking comes from. One side has their back against the wall, so the natural assumption is they’ll want it more. And fair enough, there is some truth in there. But pressure does not always bring out the best in a team or player. Dave Stieb, one of the best Toronto Blue Jays players of all time, found that out in Game 7 of the 1985 ALCS, when he gave up six runs with a place in the World Series on the line. 

2. "They're due"

Hand in hand with ‘they have to win’ usually comes ‘they’re due’, especially after a side has lost, say, three on the spin. A striker goes a couple of games without scoring, and the same logic surfaces. Surely he can’t keep missing forever — they paid $50 million for him, didn’t they? There’s an obvious pull to that way of thinking because every bad run does end sooner or later. The problem is, that tells you nothing about whether tonight is the night.

What gets me is how easily we change the rule depending on the run. Lose five in a row; they’re due. Win five straight, and you’d be mad to go against them because they’re flying. It’s a funny contradiction, and one a 2017 study picked up on using basketball scoring streaks. People expected positive runs involving their favourite team to continue, yet negative ones to end. The researchers called it motivated reasoning, the same thinking behind plenty of gambling fallacies: give us a run of results, and we’re pretty good at finding a story that lands where we wanted it to all along.

Of course, I’m not saying chuck form out the window. Far from it. It’s one of the first things I look at when betting online. I want to know how the sides have been getting on, what happened when they met before, and, more importantly, whether anything has changed since. New manager? Different setup? Key player back? Someone suddenly playing a new role? All of that needs taking into account. The danger is seeing three defeats or four wins and deciding that the sequence alone tells you what comes next.

3. "They always beat them"

Among the most convincing betting clichés are the ones that come with numbers attached. “They have to win” or “they’re due” still leave plenty of room for interpretation. “They’ve lost seven straight here” gives you something much more concrete to latch onto. “Team X owns Team Y.” “This quarterback has never won in this stadium.” “This coach is 8-1 against that coach.” Those things really happened, which makes it very easy to start believing history is about to repeat itself.

A lot of this is probably superstition more than anything else. Take the Minnesota Twins at Yankee Stadium. Yes, the record is ugly, and the numbers are there in black and white. The thing is, though, most of that history belongs to different squads, managers, pitchers, and everything that comes with them. How much of it actually follows the badge, or gets into the heads of the players wearing the jersey now, is another question.

Even when there is something real behind the numbers, you’ve still got the price to worry about. One NFL study covering 3,504 games found home teams won 58% of the time, so home-field advantage was hardly a myth. Blindly backing them against the spread, though, won just 49.9% of bets. Why the drop? Because even back then, the line was already adjusting for the home edge. Sports betting sites do the same today, so treating home turf as another reason to back the same side means you’re effectively giving extra weight to something the odds have already accounted for.

4. "Vegas knows something"

Sometimes it’s the price itself that starts the whole thing. You look at a matchup, one side seems clearly stronger, then you see the line and think, hang on, why are they only -3.5? What does the sportsbook know that I don’t? Before long, a perfectly ordinary number has become a trap line, and now you’re second-guessing the game instead of judging the bet in front of you.

There are all sorts of reasons sports betting lines move, some you may not even have had on the radar. An injury might shift the picture straight away, or there could be something in the matchup dragging the price someplace else. Sharp money comes in, and that’s enough on its own. None of that means there’s a secret tucked behind every line that catches you off guard. 

And this is where I think “Vegas knows something” becomes so hard to shake. It can explain almost anything after the fact. The suspicious underdog wins? Bookies knew. The obvious favorite wins anyway? Funny how quickly we forget that the line was supposedly screaming “trap” before kickoff. You remember the one that made the theory look clever and quietly lose track of all the cases where it told you nothing. There’s a contradiction in it, too. We’re saying sportsbooks are sophisticated enough to know something the rest of us don’t, yet equally careless to reveal it through a line that any bettor can crack just because it “looks weird.”

That’s not to say questioning a price is wrong. If one book still has a rushing prop at 54.5 while others have moved to 61.5 after a teammate is ruled out, there’s something concrete to investigate. That’s different from seeing an unexpected number and treating your own surprise as evidence.

5. "This one is a lock"

This is where a lot of these narratives end up. “Free money.” “Can’t lose.” “Mortgage job.” “There’s no way they get beaten.” Maybe the most revealing is: “I just can’t see how this loses.” 

That might sound like a read on probability, when really it’s about what you can picture — and that's very different. Next thing you know, the pre-set betting budget somehow doesn’t count for this one. A 2015 PLOS ONE study found the same kind of optimism creeping in with teams fans cared about: NFL supporters tended to rate their own side too highly and knock down teams they disliked.

Don’t let the cliché take over 

None of this means form, must-win games, or an old head-to-head record should be ignored. There might be something in there. It’s when the phrase starts doing all the work that I’d worry. “They’re due.” Okay, why? “They have to win this one.” Maybe, but look at how the manager and players are handling the pressure. Their opponents might have just as much riding on it. 

I’m fine with following the cliché if there’s actually something behind it. But don’t let a catchy line do all the thinking for you. That’s where a few harmless-sounding words can start costing money.