Nelson was optioned to Triple-A Reno on Sunday.

EDGE Analysis

Nelson had notable struggles in his last two starts. In both his start Aug. 5 and Aug. 11, he allowed six earned runs in three innings. The 25-year-old has had season-long struggles as well with a 5.47 ERA. The starter will head back to Triple-A Reno for the first time since last season. In a corresponding move, the Diamondbacks selected Bryce Jarvis from Reno.

Nelson (6-7) yielded six runs on seven hits and a walk over three innings Friday, striking out two and taking a loss against the Padres.

EDGE Analysis

After serving up a two-run homer to Xander Bogaerts in the second inning, Nelson has tagged with four more runs in the third. Nelson has allowed at least five runs in four of his last seven appearances, posting a 7.60 ERA during that span. His recent rough stretch has raised his season ERA to 5.47 with an 84:38 K:BB across 128 innings. Nelson is currently lined up to start in Colorado next week.

Nelson (6-6) took the loss against Minnesota on Saturday, allowing six runs on eight hits and no walks while striking out five batters over three innings.

EDGE Analysis

After posting a scoreless first frame, Nelson struggled to keep the Twins off the basepaths. He gave up three runs on three hits -- including a triple and a homer -- in the second inning, then surrendered three more runs on four hits in the third, which proved to be his final frame. Nelson matched his shortest outing of the campaign, quelling what had been a relatively effective four-game stretch following the All-Star break during which he had recorded two quality starts and posted a 3.55 ERA. While Nelson has been good enough this season to hold down a spot in Arizona's rotation, his 5.16 ERA and 5.9 K/9 aren't of much use in most fantasy formats.

Nelson allowed two runs on five hits and three walks while striking out one over 6.2 innings in a no-decision versus the Giants on Monday.

EDGE Analysis

Aside from the lack of strikeouts, it was a strong showing for Nelson following his five-run mess against the Cardinals a week ago. The right-hander had quality starts in three of his six outings in July, though he continues to mix in fairly equal shares of good and bad performances. For the season, he's at a 4.84 ERA, 1.39 WHIP and 75:36 K:BB through 119 innings over 22 starts. Nelson is projected for a road start in Minnesota this weekend.

Nelson allowed five runs on eight hits and three walks while striking out one over six innings in a no-decision versus the Cardinals on Monday.

EDGE Analysis

Nelson has had three good starts and two poor ones in July, with Monday's outing falling in the latter category. The right-hander was at least efficient, needing just 87 pitches (56 strikes) to get through six frames. He's now at a mediocre 4.97 ERA, 1.41 WHIP and 74:33 K:BB through 112.1 innings over 21 starts this season, though he's shown little consistency from one outing to the next. He's projected for a home start versus the Mariners over the weekend.

Nelson (6-5) earned the win over Atlanta on Wednesday, allowing two runs on three hits and one walk while striking out five batters over seven innings.

EDGE Analysis

Nelson didn't overpower the intimidating Atlanta offense, as he tallied just seven whiffs and five punchouts. However, the right-hander was efficient and effective during his seven frames, throwing 52 of 84 pitches for a strike and issuing just one walk. Two of the three hits against him left the park, but each was a solo shot, allowing Nelson to minimize the damage. He's gone seven or more innings in three of his past five outings, notching a quality start and a win in each of the three lengthy appearances. Nelson's 4.82 ERA on the campaign is far from spectacular, but it's partly the result of a handful of blow-ups, and he's given up two or fewer earned runs in nine of his 20 outings overall.

Nelson didn't factor into the decision in Friday's 7-2 loss to the Blue Jays, giving up two runs (one earned) on nine hits over 5.2 innings. He struck out three without walking a batter.

EDGE Analysis

The right-hander fell one out short of his sixth quality start of the season, getting lifted after 97 pitches (62 strikes), but despite the stingy outing Nelson was on the hook for his sixth loss of the year before Arizona managed to tie things up in the top of the seventh inning. Toronto then erupted for five runs in the bottom of the frame to put the game out of reach. Nelson has a mediocre 4.46 ERA, 1.44 WHIP and 31:11 K:BB through 42.1 innings since the beginning of June, and his rotation spot could be in jeopardy if the Diamondbacks get aggressive at the trade deadline.

Nelson (5-5) allowed seven runs on nine hits and struck out just one over three innings to take the loss Thursday against the Mets.

EDGE Analysis

Nelson gave up two-run home runs to Pete Alonso and Francisco Alvarez in the short start. Prior to Thursday, Nelson had allowed a combined 10 runs over his last four starts, spanning 23.1 innings. The poor outing vaulted his ERA to 5.19 with a 1.43 WHIP and 65:29 K:BB through 93.2 innings to close out the first half. The Diamondbacks will be on the road for their first two series out of the All-Star break, so Nelson's next start is likely to be either in Toronto or Atlanta.

Nelson (5-4) allowed a run on three hits and a walk while striking out six over 7.1 innings to earn the win Saturday over the Angels.

EDGE Analysis

Nelson gave up a solo home run to Anthony Rendon, but the Diamondbacks were able to take the lead in the sixth inning. After plenty of ups and downs early on, Nelson has turned in a pair of impressive starts in his last two outings, limiting the Angels and Giants to a combined two runs, six hits and three walks over 14.1 innings. The 25-year-old trimmed his ERA to 4.67 with a 1.38 WHIP and 64:29 K:BB through 90.2 innings over 17 starts. It remains to be seen if he can sustain his recent success, which he'll attempt to do in a projected home start versus the Mets next week.

Nelson (4-4) allowed one run on three hits and two walks over seven innings Sunday, striking out six and earning a win over the Giants.

EDGE Analysis

Nelson worked through five scoreless frames before the Giants finally broke through in the sixth inning. He completed more than six innings for the first time this year while forcing a season-best 13 whiffs. Nelson has allowed fewer than two runs in four of his last eight starts, posting a 3.80 ERA during that span. For the season, he lowered his ERA to 4.97 with a 58:28 K:BB through 83.1 frames. Nelson's next outing is projected to be a road matchup against the Angels.