They say time flies when you're having fun, and it must be true. Because believe it or not, MLB's six-month season is down to its last six weeks. But as much as every team wants to finish strong, none of them has an empty list of worries.

We're going to identify the single biggest red flag for all 30 teams in MLB. We're not talking about things that have happened so much as things that are happening. As in, right now with the end of the 2024 season inching closer every day.

Different concerns naturally apply depending on whether a team is a contender or, well, not a contender. For the former, anything that could trip up a run toward or deep into the playoffs sets off alarms. For the latter, it's about current events that don't bode well for the future.

We'll go in alphabetical order by city, checking off three at a time. Note: All playoff odds are according to FanGraphs . Arizona Diamondbacks: Their Rotation Is Healthy, But Not Yet Effective Record: 69-54, T-2nd in NL West It isn't easy to project bad vibes onto the Diamondbacks right now.

They're 30-11 run since June 29 has reinforced that the defending National League champions are, in fact, still dangerous. All the same, the rotation only has a modest 4.13 ERA amid this brilliant stretch of baseball.

Getting everyone healthy was a big step, but only sophomore righty Brandon Pfaadt can be accurately described as "hot." That must change between now and the playoffs. Atlanta: The Rotation Has Seen Better Times Record: 64-58, .