Once you realize that you've made some strategic errors in your fantasy baseball draft, it is often too late to fix them. There is no undo button to fix a bad draft pick. It sounds simple but the best strategy is really to not make errors to begin with. Knowing what mistakes to avoid is the first step.
If you've done a few drafts then you've seen other owners in your leagues fumble their way through a draft that results in having a team that has no shot at the title. You don't want to be that guy.
You can tell that your roto draft is going in that awful direction if you find yourself making these obvious mistakes.
1. You Target Pitching Too Heavily Early OnThere are many different strategies when it comes to building a pitching staff and most are centered around not investing heavily in pitching. One of those strategies is the LIMA Plan and there's versions of that same plan where some folks advocate one ace and then low-investment pitchers after that. Regardless, the biggest mistake you can make when it comes to pitching is to draft too many aces. The idea of having lots of good pitching isn't bad in and of itself. The idea of not drafting hitters with your early picks is bad though. The talent pool dries up quicker than you think. You do not want to still be drafting multiple offensive starters in Rounds 15 and on.
2. You Draft Too Many "Breakout" CandidatesI think there's a lot of benefit to grabbing a Wil Myers or Jose Abreu or Jedd Gyorko in hopes that you can take advantage of their lack of a track record by getting the "next big thing". However, be conservative in your risk-taking. When you build your team with too many boom-or-bust players, you cancel out the boom by having too much bust. For every Mike Trout, there's a Desmond Jennings and a few Brett Lawries waiting right behind him (fine players that didn't offer great return-on-investment when they were being drafted as "breakout" rookies). If you look at your team and you say "if he breaks out..." about more than just a couple players then your team is filled with too many "ifs" and you're going to suffer because of it.
3. You Don't Draft A First Baseman Early EnoughIt doesn't seem like a position of scarcity since there are a dozen good options at 1B but when you're in a league that has a DH or Corner Infielder position, you can suddenly find yourself in big trouble if you don't have a 1B by the seventh round and other teams already have multiple 1B's. After Anthony Rizzo and Jose Abreu are gone, you've found yourself in a horrible position if you haven't yet filled this spot. Don't be cute. Draft 1B early.
4. You Draft Too Many Injured or Injury-Prone PlayersThis plays along with the same theory behind drafting too many "breakout" players. There's an advertised risk with drafting a player who starts the season on the DL. That obvious risk drives his draft value down and someone eventually decides to take a chance. It's okay to be that guy. It's not okay to be that guy multiple times in the same draft. It's not okay to be taking chances on those aforementioned breakout candidates in addition to these injured players. A draft built upon risk is a draft doomed to fail.
5. You Don't Understand Your League's Position Eligibility RulesYou're looking at a cheatsheet or reading a website that makes you think that picking Evan Gattis as your catcher would be a sneaky move. You draft him and then go drink some Yoo-Hoo and carry on with life without realizing that he's not eligible at catcher in your league. Only later do you realize this and try to cover up your mistake. Suddenly your whole draft plan has shifted but it's too late to remedy the mistake.
You'd be surprised how often these mistakes occur and how much of an affect they can have upon your draft. Double-check and then triple-check anybody that you think has dual-eligibility because every league has different rules related to this.