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.

Orioles interested in Denard Span

Denard Span
AP Photo/Alex Brandon
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MASN’s Roch Kubatko is reporting that the Orioles have “some level” of interest in free agent outfielder Denard Span. The Nationals did not make a $15.8 million qualifying offer to Span, which means he doesn’t come attached with draft pick compensation unlike other free agents such as Alex Gordon and Dexter Fowler.

Span, who turns 32 in February, hit a solid .301/.365/.431 with five home runs, 22 RBI, 38 runs scored, and 11 stolen bases, but took only 275 plate appearances due to back and hip injuries. He underwent season-ending hip surgery in September but is expected to be ready to participate in spring training.

The Mets and Royals have also reportedly shown interest in Span’s services.

Blue Jays showing interest in Ryan Madson

Ryan Madson
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ESPN’s Jerry Crasnick reports that the Blue Jays are on the prowl for relievers with closing experience. Ryan Madson is one of the names on their list.

Madson, 35, had a career rebirth with the Royals in 2015. He signed a minor league deal with the club that paid him a salary of $850,000 if he made it back to the majors. Due to a plethora of arm injuries, Madson hadn’t pitched in the majors since Game 5 of the 2011 NLDS against the Cardinals as a member of the Phillies. For the Royals, he wound up becoming a crucial member of the bullpen, finishing with a 2.13 ERA and a 58/14 K/BB ratio over 63 1/3 innings.

While Madson allowed five runs in 8 1/3 post-season innings, he pitched well when it mattered most, as he hurled three scoreless frames in three appearances in the World Series against the Mets.

Madson has closing experience, with 55 career saves. 32 of them came in 2011 when he took over the closer’s role from Brad Lidge.

After signing Marco Estrada and J.A. Happ, and trading for Jesse Chavez, the Jays have bolstered their rotation but it was reported on Saturday that interim GM Tony LaCava is still focused on upgrading the pitching staff.

Trevor Cahill considering the Pirates as a potential destination

Trevor Cahill
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ESPN’s Buster Olney reports that free agent pitcher Trevor Cahill is looking for a one-year, bounce-back deal. The Pirates are one of the potential teams he is considering.

It’s no surprise that the Pirates are on Cahill’s list. Pirates pitching coach Ray Searage has garnered a reputation as a miracle worker after turning around the careers of a handful of pitchers, including Edinson Volquez, Francisco Liriano, and J.A. Happ. Volquez parlayed a one-year, $5 million deal with the Pirates into a two-year, $20 million deal with the Royals last December. Liriano signed with the Pirates on a one-year, $1 million contract and turned that into a three-year, $39 million deal. Happ, dealt to the Pirates from the Mariners at the most recent trade deadline, just signed a three-year, $39 million contract with the Blue Jays.

Cahill, once a highly-regarded pitching prospect, has scuffled over parts of seven seasons in the majors. The 27-year-old owns a career 4.13 ERA with a 754/427 K/BB ratio in 1,083 2/3 innings. Cahill had some brief success after signing with the Cubs as a free agent in mid-August, compiling a 2.12 ERA in 11 appearances out of the bullpen.

Blue Jays narrow GM search to two candidates: Tony LaCava and Ross Atkins

Tony LaCava
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Jon Heyman of CBS Sports reports that the Blue Jays have narrowed their search for a new general manager down to two candidates: current interim GM Tony LaCava, and Indians vice president of player personnel Ross Atkins. Former Jays GM Alex Anthopoulos resigned last month.

LaCava was promoted to interim GM on November 2 and has already made a handful of moves along with new president Mark Shapiro. The club acquired Jesse Chavez in a trade and signed pitchers Marco Estrada and J.A. Happ to multi-year deals.

Atkins worked under Shapiro in the Indians organization for 15 seasons, so it is no surprise that he is a finalist for the open GM position.