When opportunity knocks, some teams answer the door.
Others shut off all of the lights and pretend that nobody's home.
Hindsight is one thing that general managers around baseball don't have the benefit of as they make moves to strengthen their team's roster, hopefully giving the players on the field a better chance of finding success on a regular basis in the season that lies ahead.
Thankfully, we do have the benefit of hindsight, and a number of teams have missed opportunities to, if not improve their respective rosters, at least maintain the status quo.
For those who passed on opportunity the first time, there is still time left for deals and improvements to be made. But until that happens, these are the biggest opportunities that each team missed thus far in the Hot Stove League.