8:29 AM - Kenley Jansen (BOS) gave up a run on three hits in the ninth inning Tuesday, blowing his first save of the season in a 10-7 extra-innings loss to the Guardians.

7:34 AM - Kenley Jansen (BOS) struck out one batter in a perfect ninth inning and earned a save over the Angels on Friday.

9:01 AM - Kenley Jansen (BOS) velocity is down close to three mph on his cutter thus far, Julian McWilliams of The Boston Globe reports.

8:38 PM - Kenley Jansen (BOS) (back) is available to pitch Monday against the Athletics, Christopher Smith of The Springfield Republican reports.

2:46 PM - Kenley Jansen (BOS) Sox manager Alex Cora said Jansen (back) is still being evaluated ahead of Sunday's series finale against the Mariners, and the closer's availability has yet to be determined, Ian Browne of MLB.com reports.

7:46 PM - Kenley Jansen (BOS) (back) felt good after his Grapefruit League appearance Thursday and expects to be ready for Opening Day, Mac Cerullo of the Boston Herald reports.

7:15 PM - Kenley Jansen (BOS) (back) threw one scoreless inning without allowing a baserunner in Thursday's Grapefruit League game against the Orioles,Pete Abraham of The Boston Globe reports.

2:44 PM - Kenley Jansen (BOS) (back) is scheduled to pitch for the Red Sox in Thursday's Grapefruit League contest versus the Orioles, Alex Speier of The Boston Globe reports.

3:56 PM - Kenley Jansen (BOS) (back) next Grapefruit League appearance won't come until at least Thursday, Christopher Smith of The Springfield Republican reports.

9:44 AM - Kenley Jansen (BOS) has been scratched from a scheduled appearance again Tuesday due to ongoing back tightness, Alex Speier of The Boston Globe reports.

3:45 PM - Kenley Jansen (BOS) Sox manager Alex Cora said Monday that Jansen (back) will make an appearance Tuesday against the Rays, Christopher Smith of The Springfield Republican reports.

11:29 AM - Kenley Jansen (BOS) won't make his scheduled Grapefruit League appearance Monday against the Twins due to lower-back tightness, Christopher Smith of The Springfield Republican reports.

12:29 PM - Kenley Jansen (BOS) (lat) completed a bullpen session Tuesday and is still expected to make his spring debut Friday against the Twins, Ian Browne of MLB.comreports.

11:24 AM - Kenley Jansen (BOS) (lat) said Wednesday that he's targeting the Red Sox's March 15 game against the Twins for his Grapefruit League debut, Ian Browne of MLB.com reports.

9:40 AM - Kenley Jansen (BOS) (lat) is scheduled to throw live batting practice Wednesday, Jen McCaffrey of The Athletic reports.

11:41 AM - Kenley Jansen (BOS) (lat) did some flat-ground throwing Monday, Jen McCaffrey of The Athletic reports.

11:40 AM - Kenley Jansen (BOS) reported to spring training Wednesday but won't immediately start a throwing program due to general lat soreness, Alex Speier of The Boston Globe reports.

11:07 AM - Kenley Jansen (BOS) performed an individual workout at spring training Wednesday and doesn't appear to have any physical limitations heading into the regular season, Pete Abraham of The Boston Globe reports.

12:27 PM - Kenley Jansen (BOS) Red Sox reinstated Jansen from the COVID-19 injured list Saturday, Gabrielle Starr of the Boston Herald reports.

12:48 PM - Kenley Jansen (BOS) (illness) has yet to be cleared and now might not return from the COVID-19 injured list until next week, Pete Abraham of The Boston Globe reports.

11:42 AM - Kenley Jansen (BOS) (illness) is expected to be activated from the COVID-19 injured list Wednesday, Jen McCaffrey of The Athletic reports.

5:12 PM - Kenley Jansen (BOS) was placed on the COVID-19 injured list Wednesday after testing positive for the virus, Chris Cotillo of The Springfield Republican reports.

12:28 PM - Kenley Jansen (BOS) Sox manager Alex Cora confirmed that Jansen (hamstring) will be available out of the bullpen for Sunday's series finale with the Dodgers, Jen McCaffrey of The Athletic reports.

6:20 PM - Kenley Jansen (BOS) (hamstring) threw a successful live batting practice session Saturday and believes he'll be available out of the bullpen Sunday, Ian Browne of MLB.com reports.

5:48 PM - Kenley Jansen (BOS) Sox manager Alex Cora said Friday that he'll stay away from using Jansen (hamstring) for a few more days, Jen McCaffrey of The Athletic reports.

12:27 PM - Kenley Jansen (BOS) reported improvement with his injured right hamstring Thursday and is confident he can avoid a stint on the injured list, Christopher Smith of The Springfield Republican reports.

8:06 AM - Kenley Jansen (BOS) allowed one hit, hit a batter and struck out two to record the save in Sunday's 6-5 win over the Yankees.

10:10 AM - Kenley Jansen (BOS) picked up the save in Tuesday's 5-4 victory over the Nationals, striking out one in a perfect ninth inning.

10:13 AM - Kenley Jansen (BOS) gave up a solo home run while walking one and striking out one in the ninth inning Wednesday to record his 25th save of the season in a 4-3 win over the Royals.

3:03 AM - Kenley Jansen (BOS) allowed one hit and struck out one batter in a scoreless inning to earn a save against Atlanta on Wednesday.

8:43 AM - Kenley Jansen (BOS) worked a perfect ninth inning Wednesday without walking or striking out a batter to record his 18th save of the season in a 4-2 win over the Rangers.

10:20 AM - Kenley Jansen (BOS) was not available to pitch Sunday when Joe Jacques closed out Boston's 5-4 win over the Blue Jays, Greg Dudek of NESN reports.

10:41 AM - Kenley Jansen (BOS) picked up the save in Saturday's 7-6 victory over the Blue Jays. He allowed one run on three hits while striking out three over 1.1 innings.

4:28 AM - Kenley Jansen (BOS) picked up the save in Friday's 3-2 victory over the Yankees. He allowed two hits and no walks while striking out one over a scoreless inning.

10:29 AM - Kenley Jansen (BOS) grabbed his knee during Tuesday's outing, but manager Alex Cora downplayed the issue, Christopher Smith of MassLive.com reports.

8:38 AM - Kenley Jansen (BOS) struck out one in a perfect ninth inning Tuesday to record his 13th save of the season in a 5-4 win over the Guardians.

7:31 AM - Kenley Jansen (BOS) (1-3) gave up a hit and struck out the side in a scoreless ninth inning during the first game of Saturday's doubleheader, recording his 12th save of the season, but he then gave up two runs on three hits and a walk in the second game to get tagged with the loss.

8:15 AM - Kenley Jansen (BOS) was charged with three pitch-clock violations (one warning) during the ninth inning of Saturday's 4-3 loss to St. Louis.

10:15 AM - Kenley Jansen (BOS) picked up the save in Friday's 5-3 victory over Philadelphia, tossing a scoreless ninth in which he allowed one hit and one walk while striking out three.

3:59 PM - Kenley Jansen (BOS) (back) is available out of the Red Sox' bullpen for Thursday's game versus the Blue Jays, Gabrielle Starr of the Boston Herald reports.

4:37 PM - Kenley Jansen (BOS) (back) will throw a bullpen session Wednesday, Jen McCaffrey of The Athletic reports.

4:47 PM - Kenley Jansen (BOS) (back) is not expected to be available to pitch Tuesday versus the Blue Jays, Chris Cotillo of The Springfield Republican reports.

6:19 PM - Kenley Jansen (BOS) Sox manager Alex Cora said prior to Monday's game against the Blue Jays that Jansen (back) will be available out of the bullpen, Alex Speier of The Boston Globe reports.

9:06 AM - Kenley Jansen (BOS) will not be available to pitch Sunday due to back tightness, Christopher Smith of MassLive.com reports.

8:01 PM - Kenley Jansen (BOS) was visited by trainers due to back stiffness in his appearance against the Guardians on Saturday, Christopher Smith of The Springfield Republican reports. He allowed one run on three hits while blowing his first save of the season with no walks and a strikeout.

9:15 AM - Kenley Jansen (BOS) picked up his sixth save of the season in Tuesday's 8-6 win over the Orioles, recording the final two outs in the ninth inning.

7:41 PM - Kenley Jansen (BOS) picked up a win with a scoreless ninth inning against the Orioles on Saturday.

10:32 AM - Kenley Jansen (BOS) (illness) made a scoreless appearance Monday versus Atlanta during Grapefruit League play during his return to action.

10:53 AM - Kenley Jansen (BOS) (illness) is expected to pitch Monday against Atlanta, Ian Browne of MLB.com reports.

8:34 AM - Kenley Jansen (BOS) (lightheadedness) said he expects to pitch in Sunday's Grapefruit League game, Sean McAdam of BostonSportsJournal.com reports.

4:13 PM - Kenley Jansen (BOS) (illness) threw 17 pitches to live hitters Thursday in Red Sox camp, Pete Abraham of the Boston Globe reports.

9:16 AM - Kenley Jansen (BOS) pitched a scoreless inning in Saturday's spring game against the Astros.

9:42 AM - Kenley Jansen (BOS) threw a bullpen session Sunday and was on time in his delivery, Christopher Smith of MassLive.com reports.

3:39 PM - Kenley Jansen (BOS) is a bit behind in Red Sox camp due to an offseason illness, Jen McCaffrey of The Athletic reports.

2:08 PM - Kenley Jansen (BOS) two-year, $32 million contract with the Red Sox was formally announced by the team Tuesday.

10:43 AM - Kenley Jansen (BOS) and the Red Sox agreed Wednesday on a two-year, $32 million contract, Jeff Passan of ESPN.com reports.