As we've discussed previously, players who can be plugged in at multiple positions take on more value as we barrel toward the end of the season.

With just a few weeks left before the fantasy baseball playoffs begin in many head-to-head leagues, and time growing short in roto formats, today's corner infield spotlight will shine brightest on those players - with one exception. Let's go to work.

Editor’s Note: to read about even more waiver wire options for first base and third base, be sure to check out our famous waiver wire pickups list which is a running list that is updated daily.

First Base / Third Base Waiver Wire for Week 21

Jung Ho Kang (3B / SS, PIT) - 45 percent

What more does Kang have to do to get your attention? While his rate stats are down this month, he's still providing plenty of juice in the counting numbers. Since the break, the Pirates' Korean import boasts a .959 OPS with a half-dozen homers and 33 R+RBI in 30 games. Overall, his line sits at .287/.361/.447. In a normal season, he'd likely be a serious contender for Rookie of the Year honors. As it stands, he's not even the best rookie at his position in his division. Still, he ought to be owned in more leagues than he is right now, especially given his multi-position eligibility.

Logan Forsythe (1B / 2B, TB) - 42 percent

The Rays' playoff hopes are beginning to fade, but Forsythe's surprising season has been a significant factor in their contention to this point. He's posted a .791 OPS with 13 homers and eight steals, along with a solid .281 average and 100 R+RBI in 118 games. In the more forgiving Yahoo environment, he's also just one start or two appearances shy of qualifying at third base in addition to first and second. The veteran infielder is the kind of across-the-board contributor that many owners need down the stretch.

Trevor Plouffe (1B / 3B, MIN) - 40 percent

Plouffe won't give you much help in batting average or steals, but he's a sneaky asset everywhere else. The Twins' underrated third baseman has 18 homers and 126 R+RBI on the season, making him a top-12 player at the position in standard leagues. His production compares favorably to universally owned players like Kyle Seager and Evan Longoria. Though Minnesota's improbable success has subsided in recent weeks, Plouffe is on track for the best season of his career.

Travis Shaw (1B, BOS) - 13 percent

The only player on this week's list who doesn't offer eligibility at multiple positions is also the hottest hitter of the bunch. Shaw has slashed .382/.427/.691 since being called up last month, blasting six homers and adding 28 R+RBI in that time. In a lost season for the Red Sox, Shaw has been a pleasant surprise. Sure, the .370 BABIP, 26.1 HR/FB%, and relative lack of pedigree probably mean he's bound for a correction. But the rookie posted consistently solid walk rates throughout the minors and flashed decent pop, so it's not hard to imagine him continuing to contribute down the stretch. Boston will take what it can get - so should you. Ride the hot hand and see what develops.

Lonnie Chisenhall (1B / 3B / OF, CLE) - 2 percent

Another team whose season has been a disappointment, the Indians are giving their former top prospect a chance to reclaim a starting gig. Chisenhall looked like a switch had flipped last year; at the break, he was sitting on a .332/.396/.519 line. The second half was less kind to him, as he posted a miserable .591 OPS. His production, or lack thereof, in the first half of this season was such that the Tribe demoted him to Triple-A. Since rejoining the big club three weeks ago, however, Chisenhall is hitting .385/.439/.558. He's strictly a deep or AL-only play right now, but owners in those formats might be able to catch lightning in a bottle with him again.

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