The Nationals surprisingly sent Ross to Triple-A at the end of spring training, instead opting to use Jeremy Guthrie as their fifth starter to open the season. Guthrie's stint with the Nats lasted less than one inning, and Ross was ultimately called up in mid-April the next time the team needed a fifth starter. After winning his 2017 debut, Ross scuffled in consecutive outings and was sent back to Syracuse. Once he returned in May, he tossed a gem in his first start back, but he struggled to find consistency with his sinker and slider. Ross had a six-start stretch that included a 2.95 ERA from early June through July 4th, but his velocity dropped and it was revealed that he had a torn UCL, which required Tommy John surgery in July. A return in 2018 is possible, though it's unlikely to happen before August, if it happens at all.

Ross followed in his brother Tyson's footsteps straight to the DL in 2016, as shoulder issues cost him 10 weeks over the summer, but his overall numbers were similar to his rookie performance. His BABIP spiked and took his WHIP with it, but his K/9, BB/9 and HR/9 rates were all right in line with 2015. Left-handers still punished him to the tune of a .356 wOBA, as he has yet to find an offspeed pitch that can give them trouble. The biggest concern with Ross remains his long-term health, considering Tyson's career arc and the similarities in their builds and mechanics on the mound. The Nationals are counting on a healthy Ross to shore up the middle of their rotation. His 93-mph fastball, excellent slider and work-in-progress changeup should be up to the task. The long-term health risks are certainly legitimate, but in single-season leagues, the younger Ross deserves another look at a clearance price.

Tyson’s younger brother seemed to have learned a lot from big brother (six years difference) and looked a lot like him on the mound physically, in mechanics and pitch arsenal. Joe’s biggest difference is a positive: his walk rate. Tyson has never had fewer than 3.3 BB/9 in a season which kept in line with his minor league record. Joe had a 2.6 BB/9 as a minor leaguer and then a 2.5 with Washington. There’s work to be done, though. The changeup was a nightmare and led to a 348-point platoon split in favor of lefties. Big bro’s response to a similar issue has been “what’s a changeup?” as his use of one has essentially vanished. Joe doesn’t need to do the same just yet as his change has shown flashes of being at least average. He’ll need to improve vs. lefties because he’s unlikely to stay otherworldly vs. righties (2nd-best OPS vs. RHB from his callup; between Kershaw and Greinke). His 2015 ERA over a full season would still be good at 23 years old.

Ross was trending toward joining his older brother Tyson in the San Diego rotation as early as 2015 before he was traded to Washington in the offseason. Reaching Double-A for the first time as a 21-year-old last season, the younger Ross impressed with a 19:1 K:BB over 20 innings with San Antonio. The success down the stretch followed improvement in his numbers with the move from the Midwest League to the California League to begin 2014. In addition to missing bats at a steady clip, Ross has continued to induce a lot of contact outs on the ground, posting a combined 1.59 GO/AO in 2014. With a three-pitch arsenal that includes a 91-92 mph two-seam fastball (he can touch 96 mph with his four-seamer), above-average slider and improving changeup, Ross may become a very good mid-rotation starter in short order.

The Padres used their 2011 first-round draft pick (25th overall) on Ross, a right-handed pitcher out of Bishop O'Dowd High School in Oakland. His fastball has been clocked as high as 95 mph and he also throws a power curve and a nice change-up.