Edwin Encarnacion could be third to lead in Home Runs playing for two teams in a season.

Since 1903 only two batters have led their league in Home Runs in a season while playing for more than one team in that season. Edwin Encarnacion could become the third, all in the American League. 2019 AL HR leaders so far:

Home Runs

1.	Trout • LAA	31
2.	Encarnacion • 2TM	29
3.	Bregman • HOU	26
	Soler • KCR	26
5.	Sanchez • NYY	24
6.	Vogelbach • SEA	23
	Kepler • MIN	23
8.	Chapman • OAK	22
	Springer • HOU	22
	Gallo • TEX	22
	Nunez • BAL	22

Edwin Encarnacion: June 15, 2019: Traded by the Seattle Mariners with cash to the New York Yankees for Juan Then (minors).

21 home runs with Seattle
8 home runs with the Yankees

1951 AL HR leaders:

Home Runs

1.	Zernial • 2TM	33
2.	Williams • BOS	30
3.	Robinson • CHW	29
4.	Easter • CLE	27
	Berra • NYY	27
	Wertz • DET	27
7.	Rosen • CLE	24
8.	Vollmer • BOS	22
9.	Doby • CLE	20
10.	Joost • PHA	19

Gus Zernial: April 30, 1951: Traded as part of a 3-team trade by the Chicago White Sox with Dave Philley to the Philadelphia Athletics. The Philadelphia Athletics sent Paul Lehner to the Chicago White Sox. The Philadelphia Athletics sent Lou Brissie to the Cleveland Indians. The Cleveland Indians sent Minnie Minoso to the Chicago White Sox. The Cleveland Indians sent Ray Murray and Sam Zoldak to the Philadelphia Athletics.

Zernial had only two singles in 19 at bats with the White Sox, then all 33 of his 1951 homers with the Philadelphia Athletics. In 1953 Zernial hit 42 homers, one fewer than Al Rosen.

1915 AL HR leaders:

Home Runs

1.	Roth • 2TM	7
2.	Oldring • PHA	6
3.	Peckinpaugh • NYY	5
	Jackson • 2TM	5
	Boone • NYY	5
	Burns • DET	5
	Fournier • CHW	5
	Walker • SLB	5
9.	Ruth • BOS	4
	Caldwell • NYY	4
	Collins • CHW	4
	Pipp • NYY	4
	Maisel • NYY	4
	Kavanagh • DET	4
	Crawford • DET	4

Notice rookie Red Sox pitcher Babe Ruth tied for 9th in home runs hit as a batter.

Braggo Roth: August 21, 1915: Traded by the Chicago White Sox with a player to be named later, Ed Klepfer and $31,500 to the Cleveland Indians for Shoeless Joe Jackson. The Chicago White Sox sent Larry Chappell (February 14, 1916) to the Cleveland Indians to complete the trade.

White Sox: 240 AB, 3 HR
Indians: 144 AB, 4 HR

The White Sox would become known as the Black Sox for taking money from gamblers to intentionally lose the 1919 World Series. One of those Black Sox was acquired in the trade for Roth: Shoeless Joe Jackson.

https://sabr.org/bioproj/person/05f5df36

his article was written by Dan Holmes

Bobby Roth, sometimes called Braggo, was an often insufferable self-promoter who bounced around among six American League teams in the years surrounding World War I, and was on the wrong side of two of the most lopsided trades of the Deadball Era. A player with diverse skills, Roth won a home run title and also stole home as many as six times in a season. But he was hampered by what one source called "the unhappy faculty of gaining enemies — apparently with cold deliberation." ...

In the last week of the season, Roth slugged three homers to give him a total of seven, enough to edge Rube Oldring for the American League lead. Roth became the first man in the American League, and the first player since Bill Joyce in 1896, to capture a home run title while playing for more than one team. Ironically, the much-traveled Roth had hit all seven of his homers on the road.