Brothers in Major League Baseball … not at all unusual, as this massive story makes clear.

MLB brothers having big years in the same season … quite a bit more unusual, and MLB brothers also having very similar big seasons … even more rare.

Looking, in this case, at the Seager brothers, Kyle and Corey.

Let’s start with the numbers, as of this writing.

On-base percentage: Corey .361, Kyle .359

OPS: Corey .884, Kyle .885

Doubles: Corey 29, Kyle 28

Triples: Corey 3, Kyle 2

Home runs: Corey 17, Kyle 20

Runs: Corey 66, Kyle 59

Batting average: Corey .307, Kyle .284

Games played: Corey 99, Kyle 100

At-bats: Corey 398, Kyle 380

Stolen bases: Corey 1, Kyle 1

WAR: Corey 3.8, Kyle 4.3

In only one significant statistic do we find any major divergence in performance — RBI.

Kyle has 67 runs batted in, Corey has 47, and much of that could be about where they hit in the lineup — and may explain their bit of a gap in WAR (wins above replacement), along with Kyle’s better reputation as a defensive player.

Kyle bats fifth for the Mariners, with Robinson Cano and Nelson Cruz just ahead of him. Each has an OBP in the .360s, which means lots of runners on base when Kyle Seager hits.

Corey, meantime, bats second for the Dodgers, generally after the pitcher’s spot and Chase Utley. Lots fewer guys in scoring position, with those two slots ahead of him.

What is curious about these brothers having pretty much the same season … is that, while they look like brothers, facially, they have different physiques. Corey is 6-4, 215 and plays shortstop. Meanwhile, Kyle is 6-0, 210, which suggest a more compact, perhaps stronger player, who plays third base.

Just strikes me as interesting, that brothers should be having such similarly fine seasons across so many statistical categories.

I wonder how many other sets of MLB brothers have had such similar performances in the same season.

Certainly, baseball has produced lots of brothers who were good. Joe and Dom DiMaggio. Felipe and Matty Alou. Paul and Lloyd Waner. Dizzy and Paul Dean.

But, often, brothers peak in different years … as well as being different sorts of players.

Matty and Felipe Alou finished first and second in National League batting average in 1966, but Matty was the epitome of a slap hitter, with a career batting average of .307 and 31 career home runs, while Felipe hit 209 home runs, including 31 in a single season.

So, just wondering if any brothers rival the Seagers for carbon-copy seasons. Feel free to let me know.