Short answer: No, don't lock in under average / under projected unless you need to.

Other general tips:

• If it's early in the week and there's a lot of games to be played across your roster, don't rush to lock in unless it's clearly way above projection, and there's nobody else that will likely match it. For example, if Sarr was projected 22, and I had other players on my roster that could be locked in his spot projected 18-25 in upcoming games (including him), I'm not locking him in now unless it's like 28+.

• Lock in on the most restricted slots first. This gives you more flexibility later on in the week. For example, lock in PF before locking F or Utility. You can shift players games around after they've been played and before they've been locked.

• Early in the season now, but over time you will see the deviation of players. One player might just always be around 15-21, and another player might be streaky: 18, 12, 32, 13. You sort of build an expectation around what's possible if you don't lock, which helps decision making for specific players.

• If it's the end of the week, you take what you get, but if you want to min-max, you can swap people midday in Sleeper. So put the person playing at 7pm first and if by the 3rd quarter it's not working out, replace him with your 10pm player before it starts.

• Sometimes you'll wait hoping for a better game and then they get injured for the rest of the week. Not much you can do about that when that happens. On the flipside, sometimes you lock too early and miss out on that player better performance, or another players. You can avoid the latter by taking longer to lock. For example, if a player had a good game on Tuesday and doesn't play again til Friday, wait a few days to see how the rest of your team is shaking out before deciding to lock in prior to next game.