Midweek Fantasy Baseball Waiver Wire Targets: Rising Bats and Arms

The middle of the work week is here, which means it's time for our third fantasy baseball waiver wire article of the week!

Here are the stories we published on Monday and Tuesday. Also check out Wednesday's starting pitcher streaming article.

Fantasy baseball waiver wire options can be found all season on FantasySP!

TJ Rumfield - Colorado Rockies

Rumfield is rostered in 23% of fantasy baseball leagues right now. He was barely owned to kick off the regular season.

Rumfield has started his first big league season hot at the plate. Over 11 games and 40 plate appearances, he has a .389 average and .450 on-base percentage. Rumfield has 14 hits, including two homers, a double and a triple, along with seven RBIs, six runs scored, four walks and seven strikeouts.

He starts against right-handed pitchers, and bats fifth, so he's in a good fantasy setup for production. Hitting in Colorado also boosts his value a bit.

Being in a platoon means he will likely top out as a deep-league asset, but the way he's hitting now, he's deserving of more ownership in deeper leagues. Add the first baseman until his bat cools off a bit.

Will Warren - New York Yankees 

Warren is up to 59% as he prepares to make a start today. He's one of two starting pitcher streaming options that I'm going to discuss today.

Warren will make a start against the Athletics today. That's a pretty solid matchup on paper, but Warren is more on the rise after what he's done so far.

He worked 4 1/3 innings in his first start, which was against the Giants. Warren gave up one run on five hits and two walks, while striking out three. He earned a win against Miami in his last start, giving up two runs on four hits over 5 2/3 innings, while striking out six and walking none.

Warren is worth streaming because of what he's done so far, and because of his matchup. Give him some consideration in standard leagues, and definitely fire him up in deeper leagues.

Carter Jensen - Kansas City Royals

Jensen sits at 35% rostered at the moment. He's been around 31% the past couple days.

In his 10 games and 31 plate appearances so far, Jensen has a .259 average and .323 on-base percentage. He has seven hits, including three home runs and one double. Jensen has six RBIs, five runs scored, three walks and 11 strikeouts.

He's caught fire the past three games, collecting five hits in that span, including two of his homers and the double. Jensen has four RBIs, two walks, four runs scored and two strikeouts in that trio of games.

Jensen should catch most days for Kansas City, but he'll make the lineup as the designated hitter otherwise. He just has to not oversleep.

He's an up-and-coming hitter, and should be a good long-term fantasy option. Jensen is showing positive signs in his second taste of the big leagues, and deserves to be added in more fantasy leagues. Give him serious consideration in deeper leagues, and keep tabs on him for a possible standard league pickup down the road.

Riley O'Brien - St. Louis Cardinals

O'Brien is owned in 52% of fantasy leagues. He's up about 18% since April 5, and started the year around 20% rostered.

O'Brien looks like he's emerging as the team's top choice at closer. Over six appearances, O'Brien has a win, three saves and one hold. He's allowed an unearned run on four hits, while striking out seven and walking none in 6 1/3 innings of work.

St. Louis is winning more than expected early on, and O'Brien has worked in all six of the team's wins. That's a good thing for his fantasy value, and he's most importantly earning some saves.

He's worth adding in deeper leagues today, and considering in some standard leagues. Don't wait too long to pick him up, because he's quickly being scooped up.

Brady Singer - Cincinnati Reds

Singer is rostered in 33% of leagues as he prepares for another start.

Singer will make a start against the Marlins on Tuesday night. That's a pretty good matchup on paper. He'll be facing the talented Eury Perez, but Perez has struggled to a 5.73 ERA so far, so maybe Singer can outduel him.

Singer allowed three runs on five hits and two walks over four innings in his first start. He struck out five Red Sox that day. Singer gave up two runs on six hits and a walk over five innings against Texas in his last start - he struck out five that day.

Singer is more of a middling fantasy asset, but in the right matchups, there's some sneaky good value to take advantage of. I like his matchup today, so I think he's worth trying in some deeper leagues. I'd look elsewhere for help in standard leagues - there has to be better options out there.