New York Mets rookie outfielder A.J. Ewing can contribute across all fantasy baseball formats and is getting enough playing time to make him relevant in mixed leagues to close out the 2026 campaign. In his first 69 major-league contests across 279 plate appearances in 2026, Ewing is hitting .268/.339/.411 with a .750 OPS, seven home runs, 12 doubles, 27 RBI, 14 stolen bases, and 32 runs scored for the last-place Mets. He is hitting a modest .258 (24-for-93) with a .713 OPS, three home runs, five doubles, eight RBI, 14 runs scored, and six stolen bases in 23 games (102 plate appearances) in July, but he continues to contribute everywhere and has a high long-term ceiling, primarily for his speed and amazing contact skills at the plate. Ewing's work against lefties is also very encouraging, as he's gone 17-for-63 (.270) against them with two of his seven home runs on the year. Fantasy managers searching for outfield depth upgrades could do a lot worse than an emerging young player like Ewing off the waiver wire. Ewing is rostered in only 29% of Yahoo leagues.

Colorado Rockies rookie first baseman TJ Rumfield just continues to hit, and yet he is still rostered in under half of Yahoo leagues. Rumfield has become the Rockies' everyday starter at first base in 2026 in his first year in the big leagues. He has not looked like a rookie, slashing .293/.376/.467 with an .843 OPS, 13 home runs, 53 RBI, and 46 runs scored in 106 games across 428 plate appearances. Rumfield has been pretty solid away from hitter-friendly Coors Field, too, batting .286 (54-for-189) on the road with five of his 13 home runs in 54 games played. The 26-year-old left-handed slugger has also held his own against southpaws, batting .252 (29-for-115) against them with two of his 13 home runs on the season. After hitting over .300 in both May and June, Rumfield has continued to hit in July, going 23-for-79 (.291) with a .764 OPS, a homer, four doubles, eight RBI, and nine runs scored in 23 games and 91 plate appearances. At 6-foot-5, 225 pounds, Rumfield doesn't pack quite as much punch as you'd think, but his hit tool is extremely strong. If you need an average boost, Rumfield is widely available on the waiver wire.

Fantasy managers in all league formats need to consider picking up Detroit Tigers outfield prospect Max Clark off the waiver wire before he makes his major-league debut this weekend. The club's top overall prospect, per MLB Pipeline, is coming up from Triple-A Toledo after slashing .276/.368/.434 with 11 home runs and 21 bases in 90 games with the Mud Hens. The 21-year-old former third overall pick in the 2023 MLB draft should immediately take over in Detroit as the starting center fielder due to his prospect pedigree and five-category upside. The 5-foot-11, 205-pounder, who hits from the left side, has only average pop, but he has started lofting the ball in the air more often. Clark profiles more as a strong table-setter for the Tigers atop the lineup, and he could form a dangerous one-two punch for years to come with infielder Kevin McGonigle. Most intriguing for fantasy purposes with Clark is his plus-plus speed, so fantasy managers in need of that need to hop on Clark immediately.

San Francisco Giants left-hander Erik Miller picked up another save in the 4-1 win over the division-rival San Diego Padres at Petco Park on Thursday, and he's becoming an option for fantasy managers in deeper leagues who are desperate for saves. The 28-year-old southpaw allowed a hit and struck out a batter on Thursday night to earn his fourth save of the year and his second in as many outings. He's beginning to gain the trust of manager Tony Vitello and appears to be the current favored option in the ninth inning over right-handers Caleb Kilian and Dylan Smith. Before picking up two saves in his last two appearances, Miller went 24 appearances without a save in the Giants' bullpen. On the year, the former fourth-rounder by the Philadelphia Phillies in 2019 out of Stanford University is 2-0 with a 2.78 ERA (3.26 FIP) and 1.39 WHIP with 45 strikeouts and 22 walks in 32 1/3 innings in his third year in the major leagues. Miller's four saves in 2026 are the first four saves of his career, but more opportunities should be coming before the year is up. He's rostered in only 4% of Yahoo leagues.