Sometimes you have to know when things just aren't working out.
In motorsports, the wrong driver-team pairing can lead to a disastrous season for all involved. It's a universal concept.
Formula 1 has had some prominent examples, such as Fernando Alonso and Michael Andretti at McLaren. IndyCar has too, including many of A.J. Foyt's most recent hires, plus Paul Tracy's one-year stint at Newman-Haas.
Of course, it happens in NASCAR all the time.
Kurt Busch and Phoenix Racing were a poor fit more often than they were a good one last season, as was A.J. Allmendinger's suspension-shortened time replacing Busch at Penske Racing. Neither of those driver-team pairings are together again this year, but there are still some jobs that drivers may want to reconsider in the near future.
These seven drivers, for whatever reason, should at least think about a change of scenery before this season ends...