When it comes to "Hot" and "Cold" in baseball, it's clear-cut. It's not like Football where you need to look at specific players, passes, interceptions, as well as record. Football is hard to define "Hot" because it's only a 16 game season.
Baseball is easy to define. Just look at the last 10 games. Streaks of 4 or more wins can define "hot," bit they mean little when the previous 6 were losses. I define the team "hot" if they've won 7 or more in the last 10 games. The loss of a single player, in baseball, can spell doom for a team, just as a single player who gets hot can make a huge difference.
I define "Hot" as 7 or more wins in the last 10, with no more than 3 consecutive losses.
So, who's hot?
In the National League, that term includes the Dodgers (7-3), the Reds (8-2. 5 wins), the Brewers (7-3, 4 wins), The Padres (7-3, 3 Wins), and Atlanta (8-2, 4W)
8-2 is tough to beat. But the only chance that Atlanta has (Realistically) is to grab the Wildcard from Colorado. Only 2 "hot" teams have any stake in this right now in the NL.
The American League-- well, that's a shocker. Only 2 "Hot" teams. Oakland is one (8-2, 3W) Not a threat, but COULD be a factor (playing the Angels.)
The hottest team right now has 9-1 record in the last 10, 4 wins. They can't take wildcard. The can take Division, only 2 back. And surprisingly, it's the Twins -- 2 players with 30 HR, a catcher who's likely to take batting title, But no pitcher who's even close to a 20 game winner.
2 Games back. 9 games to go, 3 of those games with Detroit.
The playoffs are just about settled. MN or Detroit vs Yanks, Boston vs Angels
National League? No lineups yet. Likely Philly, Co. LAD, and St. Louis.