Some new research could upset some long-held notions about hot streaks


For as long as I’ve been following sports — at least following it closely as an adult — there has been big tension between what people say about players in hot streaks and what the data shows. Athletes and most people who cover them have accepted hot streaks — whether they be by shooters in basketball or hitters in baseball — as something that actually influence or predict future events. The stats, however — most notably studies of basketball players in the 1980s which led to the recognition of “the hot hand fallacy” — has strongly suggested that recent past performance in small sample sizes do not predict future events.

One new study, however, presents evidence that hot streaks have predictive power. From James Wagner at the Washington Post:

Green and Zwiebel studied two million MLB at-bats from 2000 to 2011. They neutralized for the abilities of the hitter and pitchers — such as lefty-on-lefty matchups and stadium sizes — and focused on 10 major statistical categories, such as batting averages, home run percentages and strikeout rates.

They found that a hitter’s past 25 at-bats were a significant predictor of his next at-bat. When a player is hot, they found his expected on-base percentage to be 25 to 30 points higher than it would if he were cold. Home run rates jumped 30 percent and strikeout rates dropped. For pitchers in hot streaks, future performance was improved, too.

They don’t reach any hard and fast conclusions here, though there are some which seem plausible. Mostly related, I believe, to a new understanding of what is and what is not “random,” as the hot hand fallacy is based on data related to random events. I’m certainly no statistician so I can’t judge either this or other studies in this vein on their merits with any degree of authority. Maybe this supersedes the last best statistical evidence on the matter. Maybe it’s flawed. I have no idea.

My personal takeaway, though, is that there is always something to learn about baseball. And that rather than try to understand it through opinions held based on personal beliefs, authority and predispositions, it’s better to understand it based on the data. Those who skew old school have always been a bit loathe to do this. Now, however, a favorite concept of the statistically-oriented is being questioned. I’ll be curious to see (a) if this new study holds up to scrutiny; and (b) if it does, how the stats folks take to having some long-held beliefs of their own challenged.

Mike Scioscia will return as Angels manager in 2016

ANAHEIM, CA - JULY 21:  Manager Mike Scioscia #14 of the Los Angeles Angels of Anaheim in the dugout during batting practice before a game against the Minnesota Twins at Angel Stadium of Anaheim on July 21, 2015 in Anaheim, California.  (Photo by Jonathan Moore/Getty Images)
Photo by Jonathan Moore/Getty Images

It was assumed already, but Mike Scioscia made it official during Monday’s press conference for new general manager Billy Eppler that he will return as Angels manager in 2016.

Scioscia, the longest-tenured manager in the majors, has been at the helm with the Angels since 2000. There was a clause in his contract which allowed him to opt out after the 2015 season, but he has decided to stay put. He still has three years and $15 million on his contract, which runs through 2018.

Jerry Dipoto resigned as Angels general manager in July amid tension with Scioscia, so there were naturally questions today about what to expect with first-time GM Eppler in the fold. According to David Adler of, Scioscia isn’t concerned.

“I think we’re going to mesh very well,” Scioscia said. “If we adjust, or maybe he adjusts to some of the things, there’s going to be collaboration that’s going to make us better.”

Eppler is the fourth general manager during Scioscia’s tenure with the team.

After winning the AL West last season, the Angels finished 85-77 this season and narrowly missed the playoffs. The team hasn’t won a postseason game since 2009.

Carlos Gomez says he’ll be in lineup for Wild Card game vs. Yankees

Houston Astros' Carlos Gomez hoops after scoring a run against the Texas Rangers in the eighth inning of a baseball game Sunday, Sept. 27, 2015, in Houston. Gomez scored from third base on a Bobby Wilson passed ball. The Astros won 4-2. (AP Photo/Pat Sullivan)
AP Photo/Pat Sullivan

Astros center fielder Carlos Gomez sat out the final series of the regular season in order to rest a strained left intercostal muscle, but there was good news coming out of a workout today in advance of Tuesday’s Wild Card game vs. the Yankees.

This has been a lingering issue for Gomez, who missed 13 straight games with the injury last month. He aggravated the strain on a throw to home plate last Wednesday and was forced to sit while the Astros fought to keep their season alive. Astros manager A.J. Hinch told reporters last week that Gomez’s injury would typically take 45-50 days to recover from, so it’s fair to wonder how productive he can be during the postseason.

Gomez mostly struggled after coming over from the Brewers at the trade deadline, batting .242 with four home runs and a .670 OPS over 41 games.