A friend was talking about a 3-way tie at the top and I did some of the leg work and figured I would drop it here.
Ok, just to set the stage a bit, we are 3-4 vs LA and 0-3 vs Philly with 3 to go. Philly is 5-1 vs LA. If Philly wins 1 vs us they get the 1 seed and then LA beats us head to head for the 2. If we sweep, then it goes to ranked by overall winning % between the 3 teams, which Philly would be 1 and we would be 2 and LA 3, however I think that means Philly gets the 1 and then LA gets the 2 by winning the head to head between us.
Since the west is kind of tight here are those scenarios, Philly is 3-4 vs Zona and 5-1 vs SD. We are 2-5 vs SD and have yet to play any of our 7 games vs Zona. So obviously if Zona wins the west and ends in a 3 way tie we could end up the 1 seed still in a ton of scenarios, and 2 in some more. If it's sd, I think it all works out exactly like the LA scenarios.
https://www.mlb.com/news/mlb-playoff-tiebreaker-rules all info is contingent that I interpreted this links wording correctly and nothing has changed from last year.