Last scored matchup
JJ isn't on today's slate. He was last scored 10 days ago, away at Toronto Blue Jays on Sunday, September 27, 2026, where he landed on walks (54.3/100), rbis (39.9/100), runs (38/100). This page refreshes with new projections as soon as he's back in a lineup.
Recent form
JJ is 9-for-34 (.265) over his last 10 games, in line with his .215 season line. No hot streak to fade, no slump to buy — the matchup is doing the work in his score, which is the normal case. The full game log is below.
What kind of hitter he is
JJ has 22 home runs and 41 extra-base hits in 455 at-bats this season. That profile is why he grades better on the total-bases and home-run boards than his batting average alone would suggest — those boards reward damage, not just contact. Park and weather matter more for a hitter like him too, and both feed the score.
He's a left-handed bat
JJ hits from the left side, and that's the first thing the model looks at. Left-handed hitters see right-handed pitching most nights, which is the favourable side — so a lefty bat's baseline is set against righties, and drawing a left-handed starter is a genuine downgrade rather than a rounding error. When you see his score fall on a day he's still in the lineup, an opposing lefty is usually why. Handedness also shapes the park read: pull-side geometry matters more for a left-handed swing than the raw park factor suggests.
Floor and ceiling
JJ has recorded at least one hit in 72 of 127 games he's batted in — 57% — with 19 multi-hit games among them. That's a boom-or-bust profile. He'll carry a game outright and then go quiet for three, so his hits-board score tends to sit below hitters with worse power and better contact.
Home and away
JJ is hitting .237 at home (50-for-211) and .197 on the road (48-for-244) across the season. There's not much in it, which is the normal case. Home-road splits get talked about far more than they hold up.
Against Toronto Blue Jays
JJ is 3-for-11 (.273) against Toronto Blue Jays in our log, over 3 games. Worth knowing, worth not over-reading. 11 at-bats against one club is a tiny sample, and the model treats it as a minor input next to what that pitching staff actually allows to his handedness. Batter-versus-pitcher history is the most quoted number in baseball and one of the least predictive.
How our calls on JJ have graded
In the 16 games where we ranked JJ a top-20 hitter matchup, he recorded a hit 8 times — 50%. Middle of the road, which is what most players look like. Every one of those calls was graded against the real box score, misses included.
Where he lands across our boards
JJ was scored on 12 boards in that matchup, and the spread is the interesting part: walks graded 54.3/100 while triples came in at 8.6/100. Same player, same game, same opposing arm — different questions. A spread that wide usually means the matchup favours one kind of outcome over another, and it's the clearest argument for reading the board that matches what you actually care about.
How the model reads him
JJ gets scored the same way a backup infielder does — same inputs, same scale, no thumb on it. What he's done against arms of this handedness, what this particular pitcher and bullpen give up, his likely plate appearances, the ballpark, the conditions, his recent form. The weighting behind those is ours and gets re-tuned weekly against what actually happened. The output is public and graded, which is the only claim worth making.
What we'd flag
Read this page knowing what it can't do. It can't show you a line no book posted — coverage peaks around 87% for confirmed starters. It can't see a lineup change that happens after the projection publishes. And it can't tell you anything useful from one game, because the model is only measurable across a season-sized sample.