Fantasy Baseball Waiver Wire: May 6

As fantasy baseball owners get set for the first full week of May, here are my five waiver wire adds for this week.

All stats are through games on May 5.

5. Marcus Semien, SS, Oakland Athletics

Over his last 15 games, Semien is hitting .286 with a .787 OPS and six multi-hit games over that span. He has reached base in 13 of those games, and hitting toward the top of Oakland's lineup all season has pushed him into the top-10 in the American League in runs scored (25).

Semien's injury-shortened 2017 campaign (10 home runs and 40 RBI in 85 games) makes it easy to forget his 27 home runs and 75 RBI from 2016, In each of the last three seasons, he has reached double digit steals.

Semien will not offer much in batting average when it's all said and done. But for owners looking to replace Corey Seager, power numbers and scoring runs have to put him on the radar as a waiver wire add.

Yahoo! Ownership: 59%
ESPN Ownership: 56.4%

4. Tyson Ross, SP, San Diego Padres

Ross has gone at least six innings in five of six starts this season, delivering four quality starts, with a 3.28 ERA and 10.1 K/9 rate. Over his last three starts, he has 26 strikeouts over 17.2 innings.

Ross' two non-quality starts this year came in two hitter's havens, Minute Maid Park and Coors Field. He also pitched well in another hitter-friendly park, holding the Arizona Diamondbacks to one run over 7.2 innings with 10 strikeouts and three walks on April 20.

A shoulder injury sidelined Ross after just one start for the Padres in 2016, and he did not pitch well at all for the Texas Rangers last year (7.71 ERA over 12 appearances-10 starts). A return to San Diego, where he posted a 3.03 ERA with strong peripherals (9.4 K/9, 3.6 BB/9) over 64 starts in 2014 and 2015, seems to be bringing a revival.

Yahoo! Ownership: 40%
ESPN Ownership: 31.1%

3. Steven Souza, OF, Arizona Diamondbacks

Souza returned from a pectoral injury last Thursday, and he's 0-for-7 with a walk and two strikeouts in two games. But he has stepped right into the fifth spot in Arizona's batting order, and that will set him to succeed if it continues.

With the Tampa Bay Rays last year, Souza set career-highs in home runs (30), RBI (78), OPS (.810) and stolen bases (16). He was finally able to stay on the field (148 games), which helped him put up those career-bests.

Souza strikes out a lot (179 times in 2017), and he was pegged as a regression candidate heading into the season. But his power-speed combination, and spot in a potent Diamondbacks' lineup, makes Souza at least worth an add-and-stash in fantasy leagues right now.

Yahoo! Ownership: 41%
ESPN Ownership: 31.2%

2. Ryon Healy, 1B/3B, Seattle Mariners

Since coming off the disabled list (right ankle) on April 26, Healy is hitting .333 (12-for-36) with four home runs, nine RBI and eight runs scored.

After he hit 25 home runs and drove in 78 last year, Healy was traded from Oakland to Seattle during the offseason. In a shorter sample back in 2016 (72 games-269 at-bats), Healy hit 13 home runs with 37 RBI.

Healy is eligible in fantasy leagues at first base and third base (34 games last year). It's inevitable he'll cool off some, but there's enough here to put him on the fantasy radar over the long haul of the 2018 season.

Yahoo! Ownership: 21%
ESPN Ownership: 20.7%

1. Jorge Soler, OF, Kansas City Royals

Soler has fallen far short of his potential to this point in his career, but maybe he's starting to figure it out during his age-26 season. His 10-game hitting streak ended on Saturday, but he's still hitting .349 with three home runs, 10 RBI and seven runs scored over his last 11 games and he's hit second in the Royals' lineup in each of the last six games.

Kansas City's place in the standings may push a lot of their players off the fantasy radar. Time will tell if Soler can keep up anything close to what he's been doing, but he should have plenty of leash with a regular spot in the lineup and the upside is still immense.

Yahoo! Ownership: 32%
ESPN Ownership: 33.4%