No position in baseball is as volatile as relief pitcher. Even the very best reliever can be unpredictable from one year to the next. Take . He was an All-Star in 2018 who had a 0.78 ERA and a 0.83 WHIP in 80 1/3 innings. In 2019, Treinen had a 4.91 ERA and a 1.62 WHIP in 58 2/3 innings, and he was non-tendered after the season. The let him go for nothing.Teams spend countle s resources trying to identify, acquire, and develop the next great reliever even though the position is fraught with unpredictability. There are skills that point to potential succe s, of course. Great stuff and the ability to mi s bats is highly valued in the late innings. Mi sing the barrel and limiting hard contact can work too, though balls in play can equal bad things.Each year relievers come out of seemingly nowhere to have tremendous succe s. developed a splitter after bouncing around waivers and became a dominant closer. went from independent ball to the big leagues in four years. . These out-of-nowhere succe s stories happen every year.With that in mind, here Paul Martin Jersey are three pitchers who've shown the skills that suggest they could be on the verge of bullpen stardom. We're going to focus on pitchers with a decent number of big-league innings, so strikeout machine (22.0 K/9 in the minors!) doesn't make the cut following his brief September cameo. No one will be surprised if he has huge succe s. SD RP #54 2019 stats ERA3.94WHIP1.13IP32BB16K53 Had the bullpen-needy not won the World Series last year, their decision to trade righty to the for a fringe prospect and cash would've raised quite a few eyebrows. Instead, Washington won a title, Logan Couture Jersey and no one really cares that they gave away a 28-year-old pitcher who struck out 51 batters in 31 innings following the trade. Adams is a career reliever -- the former eighth-round pick has started two games in his profe sional career, both last season as an opener with Seattle -- with a fastball/slider combination that is more like a SLIDER/fastball combination. He threw the slider 64 percent of the time last season and why wouldn't he? It's a wipeout pitch that generated a mi s on nearly half of all swings, and several relievers ( , , etc.) have had extended succe s throwing 60-something percent sliders.The league average swing-and-mi s rate on sliders is 35.9 percent. Adams was at 48.8 percent last year. He also managed a better than average swing-and-mi s rate with his fastball (23.4 percent vs. 21.9 percent). Those whiffs are primarily the result of high-end velocity and an elite spin rate. Adams AverageFastball velocity95.9 mph93.4 mphFastball spin2,601 rpm2,287 rpmSlider velocity85.9 mph84.7 mphSlider spin2,829 rpm2,428 rpmThere is more to life than velocity and spin, however. Adams also mi ses so many bats because he tunnels his pitches very well, meaning the fastball and slider not only have a similar release point, but the pitches Brent Burns Jersey stay on the same plane as they approach the plate. In English, the two fastball and slider looks the same out of Adams' hand, and only begin to separate late in flight.Here is the tunneling time leaderboard among pitchers with at least 100 tunneling events recorded in 2019:Austin Adams: 0.159 seconds : 0.159 secondsNick Vincent: 0.159 seconds : 0.160 seconds : 0.160 secondsThis tells us, on average, how much flight time the two pitches have until they reach the plate when they begin to separate. San Jose Sharks Jersey To put it another way, this tells us how much time the hitter has to react after the slider starts sliding. Up to that point, it looks like a fastball. Between the velocity, spin, and tunneling, Adams has an elite bat-mi sing arsenal.Why did Adams not get his first extended taste of the show until his age-28 season? Control, mostly. Adams has a 12.5 percent walk rate in 123 1/3 career Triple-A innings, and it was a 12.3 percent walk rate in the big leagues last year. Relievers can be very effective with a high walk rate -- and are two of the best relievers of their generation and they both own career walk rates north of 11 percent -- but it does give them a smaller margin for error.Adams tore his left ACL covering first base last September and had been placed on the 60-day injured list prior to the shutdown this spring. He was not expected to return until late May or early June. Given the delayed season, it's po sible he'll be ready to go come Opening Day. Seattle's bullpen figures to be the land of opportunity this year and Adams has the tools to become a factor in the late innings."When he Marc-Edouard Vlasic Jersey 's been healthy, the strikeout numbers speak for themselves," . "He's got a special pitch. That slider is really a wipeout. He's got the demeanor you like out of a reliever, no situation is really too big for him. He likes being out there. I like bringing him in with traffic. He's got a chance to strike anybody in the league out. He's had a nice year." NYY RP #43 2019 stats ERA4.55WHIP1.48IP31 2/3BB16K37 If nothing else, righty has a unique backstory. He spent two years in the ' farm system before being released in May 2015. He was set to play in the Italian Baseball League when New York signed him out of a tryout camp in Feb. 2016. Two years later Loaisiga was in the show even though he mi sed most of 2016 and 2017 with Tommy John surgery.Loaisiga, 25, has spent the last two seasons as an up-and-down depth arm, making eight starts and 16 relief appearances for the Yankees. He also appeared in four postseason games last year, indicating some level of trust. Loaisiga has struck out 28.3 percent of the big-league batters, which is good but not truly elite, though he shows the potential to mi s even more bats given his velocity and spin rates:LoaisigaMLB AverageFastball velocity96.8 mph93.4 mphFastball spin2,422 rpm2,287 rpmCurveball velocity84.2 mph78.5 mphCurveball spin2,805 rpm2,531 rpmLoaisiga's fastball (27.8 percent vs. 21.9 percent) and curveball (45.8 percent vs. 31.2 percent) both registered better than league average swing-and-mi s rates last season, and he also throws a hard changeup with a better than average swing- Martin Jones Jersey and-mi s rate (43.6 percent vs. 30.7 percent). Three legitimate swing-and-mi s pitches will take a pitcher far.Furthermore, Loaisiga has shown a knack for limiting hard contact. Statcast puts his career expected slugging percentage at .410 based on exit velocity and launch angle, which is e sentially equal to the .412 league average. Considering more than 54 percent of his career innings have come in homer happy Yankee Stadium, an expecting slugging percentage in that range is impre sive. Loaisiga gets whiffs and doesn't get hit hard.Control has never been an i sue for Loaisiga, who has a 6.4 percent walk rate in 233 2/3 profe sional innings. He's been held back