Sports Reference Blog

We've just launched a very exciting new tool on Stathead Basketball! It's called the Versus Finder and it's the ultimate way to compare player and team stats. Here's everything you need to know about it! Read the rest of this entry

Basketball-Reference has edited its box score for the Western Division Round Robin Playoff game between the Rochester Royals and Fort Wayne Pistons on March 21, 1954. In addition to adding newly discovered assists for all players in the game, we have edited our previous total of seven assists for Cal Christensen to 10 assists, giving him a 'new' triple-double. We'll explain what we mean by that a bit below. Read the rest of this entry

Thanks to some superb sleuthing by the SABR Biographical Research Committee we have moved eight plate appearances (as well as the associated fielding statistics) with the 1882 Philadelphia Athletics from one John Farrell to another (sort of).

Here's the explanation from SABR's Bill Carle:

Our Find of the Month concerns a couple of guys named Farrell who played back in the 1870s and 1880s. I had listed John Farrell (known as Hartford Jack) playing in 1874 with Hartford. There was also a player listed as John Farrell (sometimes known as Bill) who played in the American Association with Philadelphia in 1882 and Baltimore in 1883. Justin McKinney did some research on these players and concluded that the 1882 Philadelphia AA record should belong to Hartford Jack.

Notes from 1879 and 1880 show that the Hartford man was playing shortstop and catcher for Sacramento and San Francisco. When Farrell signed with Philadelphia in 1882, a note in the Philadelphia City Item said that Philadelphia had signed John Farrell of San Francisco as change catcher. It seems reasonable to assume that this is the same man who had previously played in Hartford.

That leaves the Farrell who played for Baltimore in 1883. The Baltimore paper just identified him as Farrell of Philadelphia, the new man. There was nothing to really identify him. He could also be Hartford Jack, but there is nothing to really prove that. So we will list him as Farrell, first name unknown, until we can get further clarification as to his identity.

Read the rest of this entry

All our player pages recently received a big update. We added a new table showing every player's performances over their last five games. It looks like this:

Pretty cool! This is on all sites (except FBref, where it's still in development), but right now you can only see it on the sports that are currently in season.

Read the rest of this entry

Exciting news! We've created a new page for 2023 on Baseball Reference to track the impact of the rule changes that MLB implemented for this season.

As a baseball fan, you're likely aware that every plate appearance now includes a pitch clock and limits on timeouts to keep things moving, the bases are slightly larger to encourage more base stealing, and the shift has been banned to create more balls in play.

But are these changes having the designed impact? That's what this new page is designed to show. For example, with pace of play, here's a look at some of the stats on game time, baserunning, and the shift ban, as of today. Read the rest of this entry

Last month we added updated coverage of Negro major leagues from Seamheads to Baseball Reference. A summary of those additions can be found here. We have recently added some other new data from Seamheads featuring competitions from outside of the seven established major Negro Leagues, which we will highlight below.

Read the rest of this entry

Big news for all you Statheads! We've just added a very exciting new tool called the Versus Finder; here's everything you need to know about it! Read the rest of this entry

As the 2023 season begins, we have made some updates to our Wins Above Replacement calculations. You may notice some small changes to figures as you browse the site. As always, you can find full details on how we calculate WAR here.

New Data For Negro Leagues Players

Recently, we updated the site with the latest player records for Negro Leagues players. This update included biographical updates (such as full names, handedness, and birth/death information) but also added data for many new box scores discovered by the team at Seamheads. See the blog post for more details about the scope of this update.

2021 Park Factors

Park factors for 2021 have been re-computed to include the 2022 season, since WAR uses a three-year average for park factors when computing pitching WAR. The most significant changes here are the Milwaukee Brewers, whose pitching park factor fell from 101 to 98 (where <100 represents a pitcher’s park and >100 represents a hitter’s park), and the Los Angeles Dodgers, whose pitching park factor rose from 97 to 100.

The biggest gainers from these changes were Dodgers pitchers Walker Buehler (gaining 0.5 WAR for 2021) and Julio Urías (0.3 WAR), while Brewers ace Corbin Burnes saw his WAR decrease by 0.3 as we adjust American Family Field in Milwaukee from being a modest hitter’s park to a modest pitcher’s park. All other changes to 2021 WAR are smaller in magnitude than these three examples.

New Data From Retrosheet

Today, we are also deploying an update to past box scores, play-by-play, and game logs from Retrosheet, including play-by-play for 1,712 games that previously did not have play-by-play coverage, including 833 games in 1914, a season which previously had no play-by-play coverage at all. See the blog post for more details.

Biggest Career Movers

The top mover for position players in career WAR is Tommy Butts, whose career WAR is 2.8 wins higher after this update. Most of this value was from his stellar infield defense at shortstop. Hall of Famers Willard Brown and Buck Leonard experienced a gain of 2.1 WAR and 1.6 WAR respectively over their careers.

On the mound, we see Birmingham Black Barons pitcher Dan Bankhead leading the way, adding 2 wins to his career WAR total. Bankhead’s playing record has 41⅓ more innings pitched with the latest update.

We’ve highlighted some of the more extreme changes here, but to see full lists of the largest changes to season and career WAR totals, please see the spreadsheet here.

We have run an update on our data from our friends at Retrosheet on Baseball Reference. Retrosheet, which provides box scores and play-by-play covering most of AL/NL history, has significantly expanded the availability of play-by-play for the 1921, 1922 and 1923 seasons, and, for the first time, added play-by-play for 1914 season. Thanks to their efforts, we now have play-by-play for 65.41% of 1914 games (53% in the AL and 79% in the NL), 97.72% of 1921 games, 97.35% of 1922 games and 93.35% of 1923 games. Additionally, 38 other seasons between 1917 and 1971 have seen smaller improvements in play-by-play coverage. This is our first play-by-play for the 1914 season, so many of our statistical tables that need play-by-play in order to be calculated (win probability, situational batting/pitching, base-running/miscellaneous, batting against, etc) will now have rows for 1914 for the first time. The 1921-23 seasons previously had ~80% coverage and are now very nearly complete.

Check out our full play-by-play data coverage map.

The additional play-by-play is also available in Stathead. For example, we now have 9 walk-off home runs from 1914. Two of those were hit by Gavvy Cravath of the Philadelphia Phillies. On Cravath’s Home Run Log, you can see we now have play-by-play data (and therefore win probability added) for 18 of his league-leading 19 home runs. The most important of these 18 home runs (by WPA) was his walk-off home run on June 11 against the Reds. In the bottom of the ninth with two outs and the bases empty, he ended the game with a deep blast to center off Earl Yingling. It had a WPA of .468.

The one Cravath home run from 1914 that we’re missing (August 4) was also a walk-off home run. We know this thanks to the Tattersall/McConnell Home Run Log, a database of all homers hit in the major leagues since 1876. This third walk-off home run is not in the Event Finder because we do not have any other events for that game.

Cravath’s season WPA is 4.3, tops in the NL and second in the majors to Eddie Collins’ 4.7. On the pitching side, Jeff Pfeffer of the Brooklyn Robins leads the way at 6.4. You can check out the complete WPA stats for the AL and NL. These are subject to change as play-by-play for more games is added.

This new data, along with our recent Seamheads update, will also allow us to re-run our WAR numbers, so keep an eye out for that update this week.

Thanks to a recent updated provided to us by researchers extraordinaire Pete Palmer and Ken Pullis, Pro Football Reference now has team rushing attempts for almost every NFL game since 1940. Read the rest of this entry