Is the MLB wild card best of 3?

Is the MLB wild card best of 3? When each league only had two Wild Card teams, those teams would face each other in a single, winner-take-all matchup. Now, with the postseason expanded to three Wild Card teams per league, the opening round is a best-of-three series.

When each league only had two Wild Card teams, those teams would face each other in a single, winner-take-all matchup. Now, with the postseason expanded to three Wild Card teams per league, the opening round is a best-of-three series.