Walston (elbow) isn't expected to return from the 15-day injured list until sometime in August, Theo Mackie of The Arizona Republic reports. After turning in a 2.84 ERA, 1.42 WHIP and 11:9 K:BB in 12.2 innings through his first three big-league outings (two starts), Walston was placed on the 15-day injured list June 6. His injury was initially classified as left elbow inflammation, but the Diamondbacks have since listed him with a left elbow strain, according to MLB.com. While Walston has resumed throwing off flat ground from 60 to 100 feet, the Diamondbacks haven't yet indicated that he's been cleared for bullpen sessions, so he still looks to be several weeks away from being stretched back out for a starter's workload. All of Jordan Montgomery (knee), Eduardo Rodriguez (lat) and Merrill Kelly (shoulder) are further along in their throwing progressions and appear poised to beat Walston back from the injured list, so the 22-year-old southpaw will most likely be optioned to Triple-A Reno once he's activated.
Pederson is out of the lineup for Sunday's game against the Blue Jays. As per usual, the lefty-hitting Pederson will retreat to the bench while the Blue Jays bring a southpaw (Yusei Kikuchi) to the hill. Ketel Marte will replace Pederson as the Diamondbacks' designated hitter.
Thomas is out of the lineup for Sunday's game against the Blue Jays. The lefty-hitting Thomas will take a seat for the series finale while the Blue Jays bring southpaw Yusei Kikuchi to the hill. Jake McCarthy will fill in for Thomas in center field.
Carroll is out of the lineup for Sunday's game against the Blue Jays. After starting each of the last four games, the lefty-hitting Carroll will get a breather as the Diamondbacks close out their pre-All-Star-break schedule with a matchup against a southpaw (Yusei Kikuchi). Carroll has endured a disappointing first half in which he's slashed just .213/.300/.335, but he turned in two big games in his starts against Toronto earlier in the weekend, going 3-for-8 with two home runs, two walks, two stolen bases, seven RBI and four runs between those contests. Fantasy managers will maintain hope that Saturday's two-home-run performance in particular portends a big second half for the 23-year-old outfielder.
Gurriel went 1-for-5 with an RBI in Saturday's 12-1 win over Toronto. Gurriel returned to the lineup Saturday after missing two games due to general soreness. The outfielder has hit safely in eight of the last nine games, going 10-for-40 with eight RBI.
Castro allowed one hit and struck out one over a scoreless inning in Saturday's 12-1 win over the Blue Jays. Castro made his first appearance since being activated off the injured list Thursday. He pitched a scoreless eighth inning with the Diamondbacks ahead, 8-1. Castro had missed nearly three months with shoulder inflammation.
Marte went 2-for-3 with two walks, one RBI, one stolen base and one run scored in Saturday's 12-1 win over the Blue Jays. Marte earned his third multi-hit effort in his last four games. The second baseman is batting .297 (11-for-37) with three steals over 10 games in July as he continues to provide well-rounded offense in the top-third of the order. Overall, Marte has 18 home runs, six steals, 53 RBI, 63 runs scored and a .288/.359/.506 slash line across 404 plate appearances this season.
Herrera went 3-for-4 with a walk, one RBI and two runs scored in Saturday's 12-1 win over the Blue Jays. This was Herrera's first multi-hit effort of the season. The backup catcher is now batting .368 with no home runs, four RBI, four runs scored and one double over 23 plate appearances. While he's done well in limited action, Herrera is unlikely to see more than a couple of starts per week behind primary catcher Gabriel Moreno.