SEATTLE -- Kyle Lewis made sure his first hit in the Majors was memorable, blasting a home run over the out-of-town scoreboard in left field at T-Mobile Park in the fifth inning of Tuesday¡¯s 4-3 victory over the Reds.

For a youngster who had to overcome a major knee injury in his first year in pro ball after being drafted by the Mariners in the first round in 2016, this was a sweet start.

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"It¡¯s just another part of my story,¡± Lewis said. ¡°I¡¯m going to continue writing my story every day. You don¡¯t know what that entails each and every day, but I¡±ll continue to give it my best shot every day and see where I end up.¡±

Kyle Seager made sure Lewis¡¯ hit came in a winning effort by launching a go-ahead two-run shot of his own in the bottom of the eighth to help break Seattle¡¯s six-game losing streak.

Seager has been red hot of late, batting .314 with 16 home runs in 43 games since July 22, but the 31-year-old seemed more thrilled for his young teammate.

¡°That was pretty special,¡± Seager said. ¡°First day, the jitters and everything ... to get that first hit out of the way, and for it to be a pretty loud one was pretty cool.¡±

Lewis¡¯ shot was projected at 426 feet with an exit velocity of 106.2 mph -- the Mariners¡¯ hardest-hit ball of the night -- according to Statcast, as the rookie turned around a 94-mph fastball on a 2-0 count.

¡°Lewis has big-time power,¡± said manager Scott Servais. ¡°I¡¯m super excited for him. It¡¯s a great experience for these young kids. They¡¯ve worked really hard to get here and they need to enjoy it. When you get your first hit as a homer, he should have a smile on his face.¡±

¡°It was a lot of fun,¡± said Lewis. ¡°Just trying to keep it as simple as possible, trying not to make things bigger than they are. But when I hit that, it was definitely like an out-of-body experience a little bit, for sure.¡±

The only thing missing was fellow rookie Justus Sheffield¡¯s first MLB victory, as the Reds came from behind with a two-run homer by Brian O¡¯Grady -- off reliever Austin Adams in the seventh -- to eliminate the left-hander as the pitcher of record.

Sheffield gave up seven hits and three walks over six innings, but limited the Reds to one run with the help of four double-play grounders. The Mariners¡¯ No. 9-ranked prospect, per MLB Pipeline, remains 0-1 with a 4.43 ERA after four starts.

Having played with Lewis in Double-A Arkansas earlier in the season, Sheffield also was relishing his teammate¡¯s moment in the sun.

¡°That was the highlight of the night for me,¡± Sheffield said. ¡°Even when I was in the game, I was still pumped up, fist pumping. Just seeing what he has been through these past couple years, and getting to play with him in Arkansas, it¡¯s nothing but joy on this side. I¡¯m just very happy for him and glad he¡¯s up here.¡±

Sheffield and Lewis are two of the youngsters Seattle is building its future hopes around, and both performed well as Seattle improved to 59-86.

The Mariners used nine rookies in the game, including Donnie Walton -- another Tuesday callup -- as a ninth-inning defensive replacement. Lewis and Walton became the 64th and 65th players used by the Mariners this season, which breaks the MLB record of 64 by the Rangers in 2014.

¡°It doesn¡¯t matter where we¡¯re at in the standings, or what our win-loss record is, when you¡¯ve got guys that are debuting and guys that are young and just getting here, there¡¯s an excitement level there,¡± said Seager. ¡°There¡¯s a learning level. Every day brings something new. It can be a lot of fun, and there are certainly a lot of teaching moments.¡±