Seattle Mariners

Mitch Haniger is set to undergo core surgery after suffering a setback in his rehab. (Source: Ryan Divish on Twitter)

Fantasy Impact: The surgery will require 6-8 weeks of rest and rehab, which means Haniger is doubtful to be ready for Opening Day. The 29-year-old appeared in just 63 games last season due to a ruptured testicle and back problems. In 2018 he posted an .859 OPS with 26 homers so there is upside here if he can stay healthy this season.

Omar Narvaez was traded to the Brewers on Thursday in exchange for right-hander Adam Hill and a competitive draft pick. (Source: Milwaukee Brewers on Twitter)

Fantasy Impact: Narvaez will replace Yasmani Grandal as the Brewers starting catcher. He had a career-year in 2019, slashing .278/.353/.460 with 22 home runs, 55 RBI and 63 runs scored across 132 games. Narvaez gets upgrade in his home ballpark, but will most likely sit against left handers in favor of Manny Pina. With the park change, Narvaez should once again produce as a top-10 catcher.

Kyle Lewis went 2-for-4 with a double and an RBI in Sunday's 3-1 win over the Athletics.

Fantasy Impact: Lewis displayed tremendous power in a small sample, hitting six homers in his first 40 MLB at-bats. He impressed during his audition with the Mariners and should be in the teams outfield mix in 2020. Lewis finished 2019 slashing .268/.293/.592 with six home runs, 13 RBI, and 10 runs scored in 75 plate appearances.

Justin Dunn issued one walk and struck out three batters over two shutout innings in Sunday's 3-1 win over the Athletics.

Fantasy Impact: Dunn was used as the opener in all four of his MLB appearances this season and tossed two scoreless innings in three of those. He walked eight batters over his first 2 2/3 MLB innings but issued just one free pass over his last four frames. Dunn finished 2019 with a 2.70 ERA.

Kyle Seager went 1-for-4 with a two-run homer in Sunday's 3-1 win over Oakland.

Fantasy Impact: Seager took Oakland starter Tanner Roark deep with a two-run blast in the first inning, giving him a total of 23 long balls on the season. He surpassed last season's total of 22 despite playing in nearly 50 fewer games in 2019. Seager finished 2019 slashing .239/.321/.468 with 23 home runs, 63 RBI, 55 runs scored and two stolen bases in 443 plate appearances this season.

Dee Gordon went 1-for-2 in Sunday's 3-1 win over the Athletics.

Fantasy Impact: Gordon missed the last three contests due to back tightness, but joined the Mariners for the season finale Sunday. Gordon finished 2019 slashing .279/.304/.359 with three home runs, 34 RBI, 36 runs scored and 22 stolen bases in 421 plate appearances this season.

Marco Gonzales (16-13) allowed one run on five hits and three walks while striking out four over seven innings in Saturday's 1-0 loss to the Athletics. He was charged with his 13th loss of the season.

Fantasy Impact: Gonzalez posted another quality start, but due to the lack of run support, he was saddled with his 13th loss of the season. He will finish the 2019 campaign with a 16-13 record, 3.99 ERA, 1.31 WHIP and 147:56 K:BB in 203 innings. Gonzalez will most likely be the Mariners opening day starter in 2020.

J.P. Crawford went 1-for-3 with a double, an RBI, two walks and a run scored in Friday’s 4-3 win over the Athletics.

Fantasy Impact: Crawford laced an RBI double off A’s closer Liam Hendriks in the ninth inning to lead the Mariners to victory. He is slashing .231/.319/.380 with seven home runs, 46 RBI, 43 runs scored and five stolen bases in 388 plate appearances this season.

Justus Sheffield allowed one run on five hits and four walks while striking out two through five innings in Fridays 4-3 win over the Athletics. He did not factor into the decision.

Fantasy Impact: Sheffield walked a season-high four batters, but allowed only one run in Friday’s win. He will finish 2019 with a 5.50 ERA, 1.69 WHIP and 37:18 K:BB through 36 innings this year.

Felix Hernandez (1-8) allowed three runs on five hits and four walks while striking out three through five 1/3 innings in Thursday's 3-1 loss to the Athletics. He was charged with his eighth loss of the season.

Fantasy Impact: In what was almost certainly his last outing in a Mariners uniform, Hernandez labored through 5 1/3 frames but held the Athletics to three runs. King Felix has now lost 16 of his last 17 decisions. He finished 2019 with a 1-8 record along with a 6.40 ERA and 1.53 WHIP, both career worsts. King Felix is one of the greatest pitchers in Mariners history, he holds the franchise record in career starts (418), wins (169) and strikeouts (2,524).

Mallex Smith was not in the lineup in Wednesday's 3-0 loss against the Astros.

Fantasy Impact: Smith is hitting just .190 over his past 25 games, he's compiled a .299 OBP and 11 steals during that stretch. He was replaced in the lineup by Tim Lopes Wednesday's 3-0 loss to the Astros.

Yusei Kikuchi (6-11) allowed two runs on six hits and no walks while striking out four through six innings in Wednesday's 3-0 loss to the Astros. He was charged with his 11th loss of the season.

Fantasy Impact: Kikuchi allowed three hits and two runs in the first inning, but he settled down to fire five consecutive scoreless frames. Kikuchi finishes the season on a high note, he had a 6.10 ERA in his previous 14 starts. Kikuchi finishes the season with a 5.46 ERA, 1.52 WHIP and 116 strikeouts through 161 2/3 innings.

Tommy Milone (4-10) allowed three earned runs on three hits and three walks while striking out three across four 1/3 innings in Tuesday’s 3-0 loss to the Astros. He was charged with his 10th loss of the season.

Fantasy Impact: Milone was primary pitcher once again in Tuesday’s loss to the Astros. He’s allowed nine runs (eight earned) on 11 hits through 18 innings in the month of September. Milone is scheduled to make his final bulk relief appearance in Sunday’s game against the Athletics.

Daniel Vogelbach went 0-for-2 with a walk in Tuesday’s 3-0 loss to the Astros.

Fantasy Impact: Vogelbach had sat out the entire series versus the Orioles with neck soreness. He is 1-for-16 in his last five games and has gone without an extra-hit in 12 of his last 13 contests.

Austin Adams underwent an MRI on Sunday that revealed damage to the ACL in his right knee. He'll require surgery to repair his knee and is expected to need 6-to-8 months to recover. (Source: Greg Johns on Twitter)

Fantasy Impact: Adams should have a key role in the Seattle bullpen waiting for him once he's healthy again, but he will most likely open the 2020 season on the injured list.

Erik Swanson did not allow a baserunner and struck out one to earn the save in Saturday's 7-6 win over the Orioles.

Fantasy Impact: Swanson earned another save in extra-innings, his second of the season. He has pitched fairly well as a reliever and has now turned in four consecutive scoreless appearances. Swanson owns a 6.17 ERA, 1.24 WHIP and 52:12 K:BB across 55 innings for the season.

Shed Long went 3-for-4 with three runs scored, a walk, double and solo home run Saturday's 7-6 win over the Orioles.

Fantasy Impact: Long was productive throughout the game, reaching base four times. He has also collected multiple hits in seven of his last eight contests. Long is slashing .270/.341/.443 with four home runs, 13 RBI, 15 runs scored and three stolen bases in 134 plate appearances this season.

Matt Magill allowed two hits in a scoreless inning to earn his fifth save of the season.

Fantasy Impact: Magill recorded his first save since August 25th. He will continue to split save opportunities with Anthony Bass. Magill owns a 4.13 ERA and 1.42 WHIP with 61 strikeouts in 48 innings this season.

Austin Nola went 3-for-4 with a solo home run in Tuesday's 6-0 win over the Pirates.

Fantasy Impact: Nola is 7-for-9 (.778) with three RBI in his last two games. He's been on base eight of his last 10 plate appearances. Nola is hitting .280 with 10 home runs, 27 RBI, 35 runs and one steal in 200 at-bats this year.

Anthony Bass struck out two through 2/3 of a scoreless inning to record his fourth save of the season.

Fantasy Impact: Bass entered the game with one out and the bases loaded with a three-run lead in the ninth inning. He struck out the first two batters and retired another to earn the save in Wednesday’s 5-3 win over the Reds. Bass is 1-1 with two saves and a 4.50 ERA in his last 12 appearances.