What is the record for most consecutive wins by a pitcher in MLB history?

Hubbell's individual record includes wins in games he won coming in as a reliever. During that time, the Giants won 22 consecutive games that Hubbell started.

The record of the Cubs and Braves is consecutive wins by a team behind a single starting pitcher. This includes games which the team won, but the starter did not get the decision. The Cubs last lost with Arrieta as the starter on 30 Jul last year. However, Arrieta has had at leat 3 no decisions since then.

Between July 17, 1936 and May 27, 1937, Hubbell made 22 starts and won 21 of them. He had a no-decision on July 26. He also made five relief appearance during that time, winning three and saving two games.

So Hubbell won 24 consecutive games in which he received a decision, but not 24 consecutive starts since three wins came in relief.

Medlen and Arrietta have made 23 consecutive starts in which their team was victorious but they, personally, did not get a decision.

On July 18, 1936, New York Giants pitcher Carl Hubbell won the game and then kept on winning, closing out the season with 16 straight victories.

He didn't stop there, however. Hubbell went on to win his first eight games in 1937. He finally lost on May 31 to the Brooklyn Dodgers.

Hubbell's 24-game winning streak has stood the test of time so far; but unlike many of the other records or streaks on this list, it could conceivably be matched or broken eventually.

As mentioned in our introductory slide, Justin Verlander's six-inning effort on Tuesday night gave him 53 in a row, but his streak still falls far short of the record here.

On Sept. 12, 1967, St. Louis Cardinals pitcher Bob Gibson began a streak of pitching at least six innings in every start that lasted until May 2, 1970, for a span of 78 starts in total.

Verlander would likely have to push his current streak into the beginning of next season in order to tie or break Gibson's record. Still, it is possible, as long as Verlander stays healthy and avoids big innings.

St. Louis Cardinals Hall of Fame pitcher Bob Gibson is the current standard-bearer with 26 consecutive quality starts. Gibson started the streak on the same day he started his consecutive six innings-plus streak—Sept. 12, 1967 — and didn't end this streak until July 30, 1968.

To say that former Los Angeles Dodgers closer Eric Gagne was positively nasty in the early 2000s doesn't even come close to doing him justice.

In fact, Gagne was so nasty, that from Aug. 28, 2002 through July 5, 2004 he converted 84 consecutive save opportunities.

In 1968, Los Angeles Dodgers starting pitcher Don Drysdale went through a four-week stretch during which every pitch he threw was literally untouchable—and his current record reflects that.

From May 14 through June 4, 1968, Drysdale threw six consecutive shutouts (and for the record, the phrase "complete game shutout" is redundant), a streak that temporarily gave him the record for consecutive scoreless innings (58) as well.

To put that record into perspective, last season Philadelphia Phillies pitcher Cliff Lee led the majors in shutouts with six—for the entire season.

https://en.wikipedia.org/wiki/List_of_Major_League...

A very long list of the best streaks by pitchers, your answer should be in there somewhere

Probably Denny McClain.